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Taro Rae
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PostPosted: Sat Nov 18, 2006 7:52 pm


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The Clock Tower


This Thread is reserved for use by the Observer.

The observer will post up the Date, of Day Month Year.

Also here will be posted the Current class block that is in session.

You can also check here for the Planets and Constellations that are visible each month in the Night Skies of empyrean. This will be important for the casting of Spells, and the composition of Alchemical potions and growing Seeds for hybrids, golems and plants.
PostPosted: Sat Nov 18, 2006 8:31 pm


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Today is

Tuesday, June 24, 2008

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PostPosted: Sat Nov 18, 2006 8:45 pm


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PostPosted: Sat Nov 18, 2006 9:01 pm


Today's Constellations are


· Draco
· Camelopardalis
· Ursa Minor
· Ursa Major
· Cepheus
· Cassiopeia
· Canes Venatici
· Bootes
· Corona Borealis
· Hercules
· Cygnus
· Lyra
· Sagitta
· Vulpecula
· Aquila
· Delphinus
· Equuleus
· Aquarius
· Piscis Austrinus
· Capricronus
· Sculptor
· Pegasus
· Lacerta
· Andromeda
· Pisces
· Cetus
· Aries
· Eridanus
· Fornax
· Orion
· Auriga
· Taurus
· Triangulum
· Perseus
· Lynx
· Gemini





((These are set for 12 PM, EST.))
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Taro Rae
Captain

PostPosted: Sat Mar 10, 2007 2:40 pm


The Constellations of the Northern Sky
Part 1

information from Wikipedia
Andromeda
Andromeda (IPA: /ˌanˈdrɒmədə/) is a constellation named for the princess Andromeda (which is Greek for Ruler over men), a character in Greek mythology. The constellation is in the northern sky near the constellation Pegasus. It is most notable for containing the Andromeda Galaxy. It is sometimes called "The Chained Maiden" in English.
The brightest star in the constellation is Alpheratz (Sirrah in the image), which marks her head, Bayer designation Alpha Andromedae. Formerly considered common to Andromeda and Pegasus, as confirmed by its name, "navel of the horse", it was also designated δ Pegasi. With α, β, and γ Pegasi it forms an asterism called the Great Square of Pegasus.
β Andromedae is called Mirach, the girdle. It is 200 light years distant and of magnitude 2.1.
γ Andromedae, or Almach, is found at the tip of the southern leg of the big "A". It is a beautiful multiple star with contrasting colours.
υ Andromedae has a planetary system with three confirmed planets, 0.71 times, 2.11 times, and 4.61 times the mass of Jupiter.

Antlia
Antlia (IPA: /ˈantliə/, Latin: pump) is a relatively new constellation as it was only created in the 18th century, being too faint to be acknowledged by the ancient Greeks. The IAU adopted it as one of the 88 modern constellations. Beginning at the north, Antlia is surrounded by the sea snake Hydra, the compass Pyxis, the sails (Vela) of the mythological ship Argo and finally the centaur Centaurus.
Antlia is a faint constellation void of bright stars. The brightest star is α Antliae, a magnitude 4.25m orange giant.

Aquarius
Aquarius (IPA: /aˈkwəːriəs/, Latin: water-bearer or cup-bearer) is one of the oldest recognized constellations along the zodiac, the sun's apparent path. It is found in a region often called the Sea due to its profusion of watery constellations such as Cetus, Pisces, Eridanus, etc. Sometimes, the river Eridanus is depicted spilling from Aquarius' watering pot.

Aquila
Aquila (IPA: /əˈkwɪlə, ˈakwələ/, Latin: eagle; sometimes named the Vulture), is one of the 48 constellations listed by Ptolemy, also mentioned by Eudoxus (4th century BC) and Aratus (3rd century BC) and now also part of the list of 88 constellations acknowledged by the IAU. It lies roughly at the celestial equator. The alpha star, Altair, is a vertex of the Summer Triangle asterism.
Ptolemy catalogued nineteen stars jointly in this constellation and in the constellation Antinous, which was named in the reign of the emperor Hadrian (AD 117–13 cool , but sometimes, and wrongly, attributed to Tycho Brahe, who catalogued twelve stars in Aquila and seven in Antinous; Hevelius determined twenty-three stars in the first, and nineteen in the second.
α Aql (Altair): this multiple star system (3 components) has 0.77m and is of spectral type A7 V. It has a parallax of 0.23", and consequently is about eight times as bright as the sun.
β Aql (Alshain): its spectral type is G8 IV and it shines with an apparent brightness of 3.71m. Like Altair, it too is a multiple star system with three components.
γ Aql (Tarazed): spectral type K3 II; 2.72m
η Aql: This short-period variable star is one of the brightest classical Cepheids; its brightness varies between 3.48 mag and 4.39 mag every 7.177 days.
15 Aql: This double star is a yellow K star of 5.4 mag accompanied by a 7th mag star; it can easily be observed with small telescopes.

Aries
Aries (IPA: /ˈɛːriːz/, Latin: ram, symbol , Unicode ♈) is one of the constellations of the zodiac. It lies between Pisces to the west and Taurus to the east.
Aries' stars are rather faint except for α Ari (Hamal) and β Ari (Sharatan). Other important stars are γ Ari (Mesarthim) and δ Ari (Botein).
Teegarden's star, a recent discovery in the constellation, is one of Sun's closest neighbors around 12 light years away. It exhibits one of the largest proper motions known at about 5.06 arc seconds/yr.

Auriga
Auriga (IPA: [ɔˈɹaɪgə], Latin: charioteer) is a northern constellation. It was one of the 48 constellations listed by Ptolemy, and counts as one of the 88 modern constellations. Its brightest star is Capella, which is associated with the mythological she-goat Amalthea. The three stars ε Aurigae, ζ Aurigae and η Aurigae are called Haedi (the Kids).
ε Aurigae and ζ Aurigae are peculiar binary stars. The orbital period of ε Aurigae is approximately 27 years, with an eclipse duration of about 18 months. The visible companion is a yellowish F-class supergiant. The type of the other star is not known. ζ Aurigae has a period of 970 days, the primary is a K-class supergiant and the secondary is a B-class main sequence star. Both these systems present a rare stage of binary evolution, as the components are in a short and active evolutionary stage.

Boötes
Boötes (IPA: [boʊˈoʊtiz]), a name deriving from Egypt, is one of the 88 modern constellations and was also one of the 48 constellations listed by Ptolemy. Boötes is generally referred to as the Bear Watcher, since it appears to be watching over the constellations Ursa Major and Ursa Minor. It contains the fourth brightest star in the night sky, Arcturus. Note that the "ö" in the name is a diaeresis, not an umlaut. The constellation is located between 0° and +60° declination, 13 and 16 hours of right ascension on the celestial sphere.
τ Boötis, a relatively Sun-like star, has the massive hot Jupiter τ Boötis Ab. It is the fourth extrasolar planet discovered and is one of the most studied.
NGC 5466 is a loose globular cluster that can be observed with most telescopes. It was discovered by William Herschel on May 17, 1784.
The Boötes void, a large section of the universe devoid of galaxies, is located in the area of Boötes.

Camelopardalis
Camelopardalis (IPA: [ kəˌmɛ.ləˈpɑɹ.də.lɪs ]), Latin: giraffe), is the name of a large but faint northern constellation first recorded by Jakob Bartsch in 1624, but probably created earlier by Petrus Plancius.
Although Camelopardalis is the 18th largest constellation, it is not a particularly bright constellation, as the brightest stars are only of fourth magnitude.
β Camelopardalis is the brightest star, at apparent magnitude 4.03. This star is a double star, with components of magnitudes 4.0 and 7.4.
The second brightest is CS Camelopardalis, which has neither a Bayer or Flamsteed designation. It is of magnitude 4.21 and is slightly variable.
In some astronomical reference books, one will often see an alternate spelling of this constellation as Camelopardis.
In approximately 40,000 years Voyager 1 probe will pass within 1.6 light years the star AC+793888, which is located in Camelopardalis.

Cancer
Cancer (IPA: /ˈkansə/, Latin: crab, symbol , Unicode ♋) is one of the twelve constellations of the zodiac. Cancer is small and dim, and to many it does not resemble a crab. It lies between Gemini to the west and Leo to the east, Lynx to the north and Canis Minor and Hydra to the south.

Canes Venatici
Canes Venatici (IPA: /ˈkeɪniːz vəˈnatəˌsʌɪ, -isʌɪ/, Latin: hunting dogs) is a small northern constellation that was introduced by Johannes Hevelius in the 17th century. It represents the dogs Chara and Asterion held on a leash by Boötes.
Canes Venatici is one of three constellations that represent dogs, along with Canis Major and Canis Minor. The constellation's brightest star is Cor Caroli (α2 CVn), named by Edmund Halley in memory of the king Charles I, King of England, or his son, Charles II. It is of magnitude 2.90.
La Superba (Y CVn) is a semiregular variable star that varies between magnitudes 4.7 and 6.2 over a period of around 158 days. It is a carbon star and is famous for being deep red.
AM CVn, a very blue star of magnitude 14, is the prototype of a special class of cataclysmic variable stars, in which the companion star is a white dwarf, rather than a main sequence star.

Canis Major
Canis Major (IPA: /ˈkeɪnɪs ˈmeɪdʒə/, Latin: greater dog) is one of the 88 modern constellations, and was also in Ptolemy's list of 48 constellations. It is said to represent one of the dogs following Orion the hunter (see also the constellations of Orion, Canis Minor, and Canes Venatici.) Canis Major contains Sirius, the brightest star in the night sky, and that star is part of the Winter Triangle.
Canis Major's alpha star Sirius is the brightest star besides the Sun as seen from Earth. It is also one of the nearest. The star's name means scorching, since the summer heat occurred just after Sirius' heliacal rising. The Ancient Greeks referred to such times in the summer as dog days, as only dogs would be mad enough to go out in the heat, leading to the star being known as the Dog Star. Consequently, the constellation was named after it, as a Big Dog.
Other named stars in Canis Major (all names from Arabic):
β CMa: Murzim - The Announcer
γ CMa: Muliphen
δ CMa: Wezen - The Weight
ε CMa: Adhara - Virgins
ζ CMa: Furud - Bright Single One
η CMa: Aludra

Canis Minor
Canis Minor (IPA: /ˈkeɪnɪs ˈmʌɪnə/, Latin: smaller dog) is one of the 88 modern constellations, and was also in Ptolemy's list of 48 constellations. It is said to represent one of the dogs following Orion the hunter.
Canis Minor is a small constellation mainly consisting of the two stars, Procyon (α CMi, 0.38m) and Gomeisa (β CMi , 2.9m). Procyon is the eighth brightest star in the night sky. Procyon means "before the dog" in Greek, as it rises an hour before the Dog Star, Sirius, of Canis Major.

Capricornus
Capricornus (IPA: /ˌkapriˈkɔːnəs/, Latin for "horned (male) goat" or "goat horn") is one of the constellations of the zodiac. It is commonly called Capricorn, especially when referring to the corresponding astrological sign (symbol or , Unicode ♑). It is commonly called the sea-goat, as it is in an area of the sky known as the Sea. Capricornus is one of the 88 modern constellations, and was also one of the 48 constellations listed by Ptolemy. Under its modern boundaries it is bordered by Aquila, Sagittarius, Microscopium, Piscis Austrinus and Aquarius.
This constellation is the dimmest in the zodiac besides Cancer. Its brighter stars are found on a triangle whose vertices are α2 Capricorni (Giedi), δ Capricorni (Deneb Algiedi), and ω Capricorni.

Cassiopeia
Cassiopeia (IPA: /ˌkasiˈəʊpiə, ˌkasiə(ʊ)ˈpɪə/) is a northern constellation which Greek mythology considered to represent a vain queen who boasted about her unrivaled beauty. It is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy.
Cassiopeia contains two stars visible to the naked eye that rank among the most luminous in the galaxy: ρ Cas and V509 Cas. The star η Cas is a nearby (19.4 ly) binary star comprising of a yellow Sun-like dwarf and an orange dwarf star.
If we were to observe Earth's Sun from Alpha Centauri, it would appear to be in Cassiopeia as a yellow-white 0.5 magnitude star. The famous "W" of Cassiopeia would become a zig-zag pattern with the Sun at the leftmost end, closest to ε Cas. Cassiopeia looks like a W or a crown.

Cepheus
Cepheus (IPA: /ˈsiːfiəs, ˈsiːˌfjuːs/) is a northern constellation named after King Cepheus in Greek mythology, and is considered to represent a king. It is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy.
γ Cephei is a binary star approximately 50 light years away from Earth. The system consists of an orange subgiant and a red dwarf. Due to the precession of the equinoxes, γ Cephei will be the pole star between 3000 and 5200 AD, with the closest approach to the north celestial pole around 4000 AD. The primary component is orbited by a planet.
δ Cephei is the prototype Cepheid variable. It was discovered to be variable by John Goodricke in 1784. It varies between 3.5m and 4.3m over a period around 5.4 days.
There are three red supergiants in the constellation that are visible to the naked eye. μ Cephei is known as Herschel's Garnet Star due to its deep red colour. It is a semiregular variable star that varies between 3.4m and 5.1m over a period of 730 days. The star is around 11.8 AU in radius. If it were placed at the centre of our Solar System, it would extend to the orbit of Saturn. Like μ Cep, VV Cephei is also variable, ranging from 4.8m and 5.4m over a period around 20 years. The third red supergiant is HR 8164, whose apparent magnitude is 5.66m. Each of the stars are among the largest known.
Kruger 60 is a 10th magnitude binary star consisting of two red dwarfs. The star system is one of the nearest being only 13 light years away from Earth.

Columba
Columba (IPA: /kə(ʊ)ˈlʌmbə/, Latin: dove), is a small constellation just south of Canis Major and Lepus; it was cut out of the constellation Canis Major by Augustin Royer, in 1679.
Before erected a full constellation, Columba Noachi was already to be seen as an asterism in Bayers Uranometria of 1603[1]. This of course refers to the Torah's and Bible's Dove of Noah that was the first bird to find land after the Deluge.
The constellation is rather inconspicuous, the brightest star α Columbae having the magnitude of 2.65m. The constellation contains the runaway star μ Columbae, which was probably expelled from the ι Orionis system.

Coma Berenices
Coma Berenices (IPA: /ˈkəʊmə bɛrəˈnʌɪsiːz/, Latin: Berenice's Hair) is a traditional asterism that has since become a constellation. It is located near Leo, and was originally considered to be the tuft of hair on the end of Leo's tail.
Coma Berenices contains the North Galactic Pole, at right ascension 12h 51m 25s and declination 27° 07′ 48″ (epoch J2000.0).
The constellation is not particularly bright, having no stars brighter than fourth magnitude. β Comae Berenices is the brightest star in the constellation, at magnitude 4.26m. It is intrinsically only a slightly brighter than the Sun, which gives us an idea of how faint the Sun would appear seen from 27 light years away.
The second brightest star in Coma Berenices is α Comae Berenices (4.32m), also called Diadem. It is the only star in the constellation with a common name representing the gem in Berenice's crown. It is a binary star, with two components of almost equal magnitude. Because the orbital plane is so close to the Earth's line of sight, it was long suspected of being an eclipsing binary, but it now appears that the orbital tilt is 0.1° against the line of sight, so the stars do not eclipse each other as seen from Earth.

Corona Australis
Corona Australis (IPA: [kʰoˈɹoʊnə ɔˈstɹeɪlɪs]) or Corona Austrina (IPA: [kʰoˈɹoʊnə ɔˈstɹaɪnə], Latin: southern crown) was one of Ptolemy's 48 constellations, and also counts among the 88 modern constellations. The name contrasts with Corona Borealis.

Corona Borealis
Corona Borealis (IPA: /kəˈrəʊnə ˌbɒriˈɑːlɪs/, Latin: northern crown) is a small northern constellation whose main stars form a semicircular arc. It is one of the 88 modern constellations, and was also one of the 48 constellations listed by Ptolemy, who referred to the constellation as Corona. The Borealis (northern) was added later on, to contrast with Corona Australis, the southern crown.
It has no first magnitude stars. Its brightest star, α CrB (Alphecca, also known as Gemma) is of magnitude 2.2 (slightly variable) and is considered a member of the diffuse Ursa Major Moving Group. The constellation contains several interesting variable stars: two of the best known are R Coronae Borealis and T Coronae Borealis.

Crater
Crater (IPA: /ˈkreɪtə/, Latin: cup) is one of the 88 modern constellations and was also one of the 48 listed by Ptolemy. It is said to represent the goblet of Apollo. It has no star brighter than fourth magnitude.
γ Crateris is a close double star, with a PA of 96° and a separation of 52". The fainter companion is magnitude 9.6. This system is located 84 light years from the Sun.
R Crateris is a semi-regular variable of type SRb and a spectral classification of M7. It has a magnitude of 9.8-11.2 and an optical period of 160 days.
SZ Crateris is a magnitude 8.1 variable star. It is a nearby star system located about 44 light years from the Sun. It is also identified as Gliese 425, and in the past it was known as Abt's Star.

Cygnus
Cygnus (IPA: /ˈsɪgnəs/, Latin: swan) is a northern constellation. It was one of Ptolemy's 48 constellations, and is also one of the 88 modern constellations. Because of the pattern of its main stars, it is sometimes known as the Northern Cross (in contrast to the Southern Cross).
The bird extends over the Milky Way, appearing to fly south.
Cygnus contains several bright stars.
Deneb, α Cygni, is an extremely brilliant star, very prominent despite its distance (3230 light years). The blue supergiant forms the swan's tail, the upper end of the Northern Cross, and one of the vertices of the Summer Triangle asterism. Its also the 18th brightest star in the sky.
Albireo, β Cygni, is at the swan's beak. It is one of the most beautiful double stars of the sky, a golden star easily distinguishable in a small telescope from its blue companion.
Another interesting star is 61 Cygni. In 1838, this star had the highest known proper motion of any star in the sky; this was taken as evidence that it was relatively nearby and it was accordingly chosen as the first star (other than the Sun) to have its distance measured. It is 11.4 light years away, one of the closest stars to our solar system.
The star 16 Cygni B is an extrasolar planetary system with one confirmed planet 1.5 times the mass of Jupiter.
The star HD 188753 A in Cygnus has an extrasolar planet called HD 188753 Ab which was the first planet discovered in a 3-sun (triple star) system.
Cygnus also contains the X-ray source Cygnus X-1, which is considered to be one of the most likely black hole candidates.
In addition, Cygnus has a variety of variable stars, including XX Cyg and V508 Cyg.

Delphinus
Delphinus (IPA: /ˌdɛlˈfʌɪnəs/, Latin: dolphin), is a rather small (ranked 69th) northern constellation very close to the celestial equator. It was already included in Ptolemy's list of 48 constellations and also forms part of the modern list of 88 constellations approved by the IAU.
It looks remarkably like a leaping dolphin and thus can easily be recognized in the sky. Delphinus is surrounded (clockwise from north) by the little fox Vulpecula, the flying arrow Sagitta, the eagle Aquila, the water carrier Aquarius, the little horse Equuleus and finally the flying horse Pegasus.
Here are some of its stars:
α Del (Sualocin): B9 IV, 3.77m (multiple star system with 6 components)
β Del (Rotanev): F5 IV, 4m - 4.9 m
γ Del: one of the finest double stars in the sky.
γ1 Del: F7 V, 5.14m
γ2 Del: K1 IV, 4.27m
δ Del: A7 IIIp, 4.43m
The above mentioned stars form an asterism called Job's Coffin.
ε Del (Deneb Dulfim, or the tail of the Dolphin) is a star of spectral class B6 III with a magnitude of 4
R Del: Mira-type variable star with a period of 285.5 days; magnitude range between 7.6 and 13.8

Draco
Draco (IPA: [ˈdreɪ.koʊ], Latin: dragon) is a far northern constellation that is circumpolar for many northern hemisphere observers. It is one of the 88 modern constellations, and is also one of the 48 constellations listed by Ptolemy.
The star Thuban (α Draconis) was the northern pole star around 2700 BC, during the time of the ancient Egyptians. Due to the effects of precession, it will once again be the pole star around the year 21,000 AD.
Although Thuban's Bayer designation is α Draconis, it is not the brightest star in the constellation. At magnitude 3.65, it is more than a magnitude fainter than the brightest star, γ Draconis (Eltanin), whose magnitude is 2.23.
There are several double stars of interest in Draco. ν Draconis (Kuma) consists of two components of magnitude 4.9, 62 arcseconds apart. They can be split with binoculars.
R Draconis and T Draconis are Mira-type variable stars. R ranges between magnitudes 6.7 and 13 with a period of 245.5 days, and T ranges between magnitudes 7.2 and 13.5 with a period of 421.2 days.
σ Draconis is relatively close to Earth, only 18.8 light years away.
The north pole of the ecliptic lies within the constellation Draco. This point is very close to the galaxy NGC 6552 and within 10 arcminutes of the Cat's Eye Nebula - NGC 6543

Equuleus
Equuleus (IPA: [ɪˈkwu.li.əs], Latin: little horse, i.e. a foal') is the second smallest of the 88 modern constellations, only Crux being smaller.
Despite its smallness and lack of bright stars (none are brighter than fourth magnitude), it was also one of Ptolemy's 48 constellations.
Equuleus is the second smallest constellation, at 72 square degrees. The only constellation that is smaller is Crux. It is not a particularly conspicuous constellation; its brightest star is α Equ (Kitalpha), at magnitude 3.92m.
There are few variable stars in Equuleus. Only around 25 are known, most of which are obscure. γ Equ is an alpha CVn star, ranging between magnitudes 4.58m and 4.77m over a period of around 12½ minutes. R Equ is a Mira variable that ranges between magnitudes 8.0m and 15.7m over nearly 261 days.
Equuleus contains some double stars of interest. γ Equ consists of a primary star with a magnitude around 4.7m (slightly variable) and a secondary star of magnitude 11.6, separated by 2 arcseconds. ε Equ consists of four components. The brightest three are of magnitudes 6.0m, 6.3m, and 7.2m. δ Equ is a binary star with an orbital period of 5.7 years, which at one time was the shortest known orbital period for an optical binary. The two components of the system are never more than 0.35 arcseconds apart.

Eridanus
Eridanus (IPA: [ɪˈɹɪdənəs], Greek: a mythical river associated with Phaëton) is the sixth largest of the 88 modern constellations. It was also one of Ptolemy's 48 constellations.
At its southern end is the first magnitude star Achernar (α Eri). Achernar is a very peculiar star because it is one of the flattest stars known. Observations indicate that its radius is about 50% larger at the equator than at the poles. Responsible for this is the fact that Achernar is spinning extremely fast.
Another well-known star in Eridanus is Epsilon Eridani, which has been popular in science fiction because it is relatively close and relatively sun-like. It is now known to have at least one planet (see extrasolar planet), which is thought to be a gas giant, like Jupiter.

Gemini
Gemini (IPA: /ˈdʒɛmɪnʌɪ/, Latin: twins, symbol , Unicode ♊) is one of the constellations of the zodiac. It is part of the winter sky, lying between Taurus to the west and the dim Cancer to the east, with Auriga and the near-invisible Lynx to the north and Monoceros and Canis Minor to the south. The Gemini program is named for it.

Hercules
Hercules (IPA: /ˈhəː(r)kjəliːz, -uːliːz/) is the fifth largest of the 88 modern constellations. It was also one of Ptolemy's 48 constellations. It was named after the Roman name (Hercules) of the Greek mythological hero Herakles.
Hercules has no first magnitude stars.
Mu Herculis is 27.4 light years from Earth.
The solar apex, i.e., the point on the sky which marks the direction that the Sun is moving in its orbit around the center of the Milky Way, is located within Hercules, close to Vega in neighboring Lyra.

Hydra
Hydra (IPA: /ˈhʌɪdrə/) is the largest of the 88 modern constellations, and was also one of the 48 constellations listed by Ptolemy. It should not be confused with Hydrus.
Hydra is the largest modern constellation, at 1303 square degrees. Despite its size, Hydra contains only one reasonably bright star, Alphard (α Hya, 30 Hya), which is of apparent magnitude 1.98.
R Hydrae is a Mira variable star that ranges in magnitude between 3.5, when it is not easily visible to the naked eye, to 10.9, when a telescope is required to see it.
There are several double stars of interest in Hydra. Epsilon Hydrae (ε Hya) is a binary star with components of magnitudes 3.3 and 6.8, separated by 2.7 arcseconds. N Hydrae (N Hya) is a pair of stars of magnitudes 5.8 and 5.9. Struve 1270 (Σ1270) consists of a pair of stars, magnitudes 6.4 and 7.4.
The constellation also contains the radio source Hydra A.

Lacerta
Lacerta (IPA: /ləˈsəː(r)tə/, Latin: lizard), is one of the 88 official constellations acknowledged by the International Astronomical Union. It is not among Ptolemy's 48 ancient constellations. Instead it was created ca. 1687 by the astronomer Johannes Hevelius. It doesn't contain any really bright stars, no Messier object, no galaxy brighter than 14.5m, no globular clusters and not a single named star. Correspondingly it is rather difficult to find. The northern part lies on the Milky Way. Lacerta is located between Cygnus, Cassiopeia and Andromeda on the northern celestial sphere. It looks like a 'little Cassiopeia' as it is W shaped as well.
α Lac: this main sequence star of spectral type A1 V has an apparent magnitude of merely 3.77m. There are no other stars brighter than fourth magnitude. α Lac is an optical double star.
Roe 47: a multiple star consisting of five components (magnitudes 5.8, 9.8, 10.1, 9.4, 9. cool .

Leo
Leo (IPA: /ˈliəʊ/, Latin: lion) is a constellation of the zodiac. Leo lies between dim Cancer to the west and Virgo to the east.
This constellation contains many bright stars, such as Regulus (α Leonis), the lion's heart; Denebola (β Leonis); and γ1 Leonis (Algieba). Many other fainter stars have been named as well, such as δ Leo (Zosma), θ Leo (Chort), κ Leo (Al Minliar al Asad ), λ Leo (Alterf), and (ο Leo (Subra).
Regulus, η Leonis, and γ Leonis, together with the fainter stars ζ Leo (Adhafera), μ Leo (Ras Elased Borealis), and ε Leo (Ras Elased Australis), make up the asterism known as the Sickle. These stars represent the head and the mane of the lion.
A former asterism representing the tuft of the lion's tail was made its own constellation by Ptolemy III in 240 BC. It was given the name Coma Berenices.
The star Wolf 359, one of the nearest stars to Earth (7.7 light-years), is in Leo. Gliese 436, a faint star in Leo about 33 light years away from the Sun, is orbited by one of the smallest extrasolar planets ever found.[1]
The carbon star CW Leo (IRC +10216) is the brightest star in the night sky at the infrared N-band (10 μm wavelength).

Leo Minor
Leo Minor (IPA: /ˈliəʊ ˈmʌɪnə/, Latin: smaller lion) is a rather dim constellation that can barely be recognized as a triangle and lies between the easily discerned constellations Ursa Major and Leo. In contrast to Leo it does not belong to the ancient list of 48 constellations drawn up by Ptolemy in the 2nd century AD, but was instead created by Johannes Hevelius in 1687.
There is little to see for owners of small telescopes. There is only one star brighter than 4m:
46 LMi (Praecipua): an almost (but not quite) giant star of spectral class K0 which lies at a distance of approximately 98 light years and sports an apparent brightness of 3.83m. Praecipua does not have a Bayer designation, making Leo Minor the only constellation whose brightest star does not have one.
β LMi: strangely enough this giant star of spectral class G8 is the only star with a Bayer designation, and with its apparent magnitude of 4.21m it is not even the brightest star of Leo Minor.
R LMi: the brightness of this cool long-period variable star (a Mira variable) varies between 6.3m and 13.2m during a period of 372.19 days.
20 LMi: this binary star system is only 14.9 parsecs away from the Sun.

Libra
Libra (IPA: /ˈliːbrə/, Latin: balance) is a constellation of the zodiac. It is a fairly inconspicuous constellation and has no star of first magnitude, lying between Virgo to the west and Scorpius to the east. As the names of the brighter stars testify, it was at one point part of Scorpius' claws.
The brightest stars in Libra form a rectangle:
α Librae, Zubenelgenubi ("southern claw"), a visual binary;
β Librae, Zubeneschamali ("northern claw");
γ Librae, Zubenelakrab ("scorpion's claw");
σ Librae, an eclipsing variable.
α and β Librae are the scales' balance beam, and γ and σ are the weighing pans.
σ Librae was formerly known as γ Scorpii despite being well inside the boundaries of Libra. It was not redesignated as σ Librae until 1851 (by Benjamin A. Gould).

Lynx
Lynx (IPA: [ˈlɪŋks]) is a constellation of the northern hemisphere, introduced in the 17th century by Johannes Hevelius. It is so named because it is a relatively faint constellation, and one would supposedly need the eyes of a lynx to see it.
Its most notable deep sky object is the Intergalactic Tramp NGC 2419, a globular cluster that is the most distant known of its kind. It is moving faster than escape velocity at that distance; however, it appears to be in a long elliptical orbit around our galaxy, the Milky Way, and is thus not expected to escape.

Lyra
Lyra (IPA: /ˈlʌɪrə/, Latin: lyre) is one of the 48 constellations listed by Ptolemy, and is one of the 88 modern constellations recognized by the International Astronomical Union. Lyra is a small constellation, but its principal star, Vega, is one of the brightest in the sky. Vega forms a vertex of the Summer Triangle asterism. Lyra took its name from the stringed musical instrument well known for its use in Classical Antiquity and still in some areas of Greece.
According to ancient Greek mythology, the young god Hermes created the lyre from the body of a large tortoise shell (khelus) which he covered with animal hide and antelope horns. Lyres were associated with Apollonian virtues of moderation and equilibrium, contrasting the Dionysian pipes which represented ecstasy and celebration.
Beginning at the north, Lyra is surrounded by the Dragon Draco, the Greek hero Hercules, the Little Fox Vulpecula and Cygnus the swan.
Here are some of Lyra's brighter stars:
α Lyr (Vega): with an apparent brightness of 0.03m this is the second brightest star of the northern hemisphere (after Arcturus) and the fifth brightest star in all; its spectral class is A0 V and it lies at a distance of only 25.3 ly. It was the first star to be photographed.
β Lyr (Sheliak): a group of eclipsing binaries is named after this variable star (3.45m, spectral class B8 II), the Beta-Lyrae-stars.
γ Lyr (Sulafat): the main star of this multiple star system is of magnitude 3.24m and spectral class B9 III
δ Lyr: a double star consisting of a blue-white star of mag. 6m and a semi-regular red giant varying between 4m and 5m.
ε Lyr: a well-known quadruple star, also called "the Double Double" because each of the two brighter components is itself a close double.
ζ Lyr: another double star which can be split using binoculars.
RR Lyr: lent its name to a class of pulsating variable stars, the RR Lyrae-stars.

Monoceros
Monoceros (IPA: /məˈnɒsərəs/, Greek: Μονόκερος) is a faint constellation on the winter night sky, surrounded by Orion to the west, Gemini to the north, Canis Major to the south and Hydra to the east. Other bordering constellations include Canis Minor, Lepus and Puppis.
Monoceros is an almost invisible constellation, with only a few fourth magnitude stars. Alpha Monocerotis has a visual magnitude of 3.93, slightly brighter than Gamma Monocerotis, which has a visual magnitude of 3.98.
However, Monoceros does have some interesting features to observe with the aid of a small telescope. Beta Monocerotis is an impressive triple star system, the three stars form a triangle which seems to be fixed. The visual magnitudes of the stars are 4.7, 5.2 and 6.1. William Herschel discovered it in 1781 and commented it as 'one of the most beautiful sights in the heavens'.
Epsilon Monocerotis is a fixed binary, with visual magnitudes of 4.5 and 6.5.
S Monocerotis, or 15 Monocerotis, is a bluish white variable star and is located at the center of NGC 2264. However the variation of its magnitude is not too great. It has a companion star of visual magnitude 8.
V838 Monocerotis had an outburst starting on January 6, 2002.
PostPosted: Sat Mar 10, 2007 2:43 pm


The Constellations of the Northern Sky
Part 2

information from Wikipedia
Ophiuchus
Ophiuchus (IPA: [ˌoʊfiˈjukəs]), formerly referred to as Serpentarius (IPA: [ˌsɚpənˈtʰeɹiəs]), both meaning "serpent-holder", is one of the 88 constellations, and was also one of the 48 listed by Ptolemy. It is a large constellation located in the southern hemisphere near the center of the Milky Way, between Scorpius to the west and Sagittarius to the east. Of the 13 zodiacal constellations (constellations that contain the Sun during the course of the year), Ophiuchus is the only one which is not counted as an astrological sign.
Ophiuchus is depicted as a man supporting a serpent; the interposition of his body divides the snake into two parts, Serpens Caput and Serpens Cauda, which are nonetheless counted as one constellation.

Orion
Orion (IPA: /ə(ʊ)ˈrʌɪən/), a constellation often referred to as The Hunter, is a prominent constellation, one of the largest and perhaps the best-known and most conspicuous in the sky. Its brilliant stars are found on the celestial equator and are visible throughout the world, making this constellation universally recognized. In the northern hemisphere Orion is visible in the evening from November to April.
According to the most common contemporary imagery: Orion is standing next to the river Eridanus with his two hunting dogs Canis Major and Canis Minor, fighting Taurus the bull. Other prey of his, such as Lepus the hare, can be found nearby.
There are other contemporary names for Orion. In Australia, the belt and sword of Orion are sometimes called the Saucepan, because the stars of Orion's belt and sword resemble this kitchen utensil as seen from the southern hemisphere. Orion's Belt is called "The Three Kings" (or "The Magi") in some places. The constellation is also known as an "Amber" in other commonwealth countries such as the United Kingdom. Historically it has had other names, perhaps the earliest known is the Babylonian "Shepherd of Anu ", corresponding to an apparent representation of the constellation Auriga or an element of it, as a shepherd's crook.
The constellation is extremely rich in bright stars and in deep-sky objects. Here are some of its stars:
λ Ori (Meissa) is Orion's head.
α Ori (Betelgeuse), at its right shoulder, is a red star with a diameter possibly larger than the orbit of Mars. Although it is the α-star, it is somewhat fainter than Rigel.
γ Ori (Bellatrix), is at Orion's left shoulder.
ζ Ori (Alnitak), ε Ori (Alnilam) and δ Ori (Mintaka) make up the asterism known as Orion's Belt: three bright stars in a row; from these alone one can recognize Orion.
η Ori (Eta Orionis), between Delta Orionis and Rigel.
κ Ori (Saiph) is at Orion's right knee.
β Ori (Rigel), at the constellation's left knee, is a large blue-white star, among the brightest in the sky. It has three companions, invisible to the naked eye.
ι Ori (Hatsya) is at the tip of Orion's sword.
Orion is very useful in locating other stars. By extending the line of the Belt southeastward, Sirius (α CMa) can be found; northwestward, Aldebaran (α Tau). A line eastward across the two shoulders indicates the direction of Procyon (α CMi). A line from Rigel through Betelgeuse points to Castor and Pollux (α Gem and β Gem). Additionally, Rigel is part of the Winter Circle. Sirius and Procyon, which may be located from Orion by tracing lines, also are points in both the Winter Triangle and the Circle.

Pegasus
Pegasus (IPA: /ˈpɛgəsəs/) is a northern constellation, named after the mythological Pegasus, named for the winged horse. It is one of the 88 modern constellations, and was also one of the 48 constellations listed by Ptolemy.
α Peg (Markab), β Peg, and γ Peg, together with α Andromedae (Alpheratz or Sirrah) form the large asterism known as the Square of Pegasus. 51 Pegasi, a star in this constellation, is the first Sun-like star known to have an extrasolar planet. IK Pegasi is the nearest supernova candidate.

Perseus
Perseus (IPA: /ˈpəː(r)siəs, -sjuːs/) is a northern constellation, named after the Greek hero who slew the monster Medusa with the help of some godly items. It is one of Ptolemy's 48 constellations and was also adopted by the International Astronomical Union as one of the 88 modern constellations. It contains the famous variable star Algol (β Per), and is also the location of the radiant of the annual Perseids meteor shower.
α Per (Mirfak): The brightest star of this constellation is also called Algenib (a name which is used for other stars as well, e. g. γ Peg). Mirfak (Arabic for elbow) is a supergiant of spectral type F5 Ib with an apparent brightness of 1.79m lying at a distance of ca. 590 light-years. Its luminosity is 5,000 times and its diameter is 62 times that of our Sun.
Algol (β Per): This may not be the brightest star of this constellation, but it definitely is its most famous star. Algol (from Arabic al-Ghul, which means The Ghoul or The Demon Star) represents the eye of the gorgon Medusa. This star is the prototype of a whole group of eclipsing variable stars. Its apparent brightness ranges between 2.12m and 3.39m with a period of merely 2.867 days. It is of spectral type B8 V and lies at a distance of only 93 ly.
Nova Persei 1901 (GK Per), a bright nova discovered on February 23, 1901.

Pisces
Pisces (IPA: /ˈpʌɪsiːz/, Latin: fish (plural)) is a zodiac constellation which lies between Aquarius to the east and Aries to the west.
The Vernal equinox is currently located in Pisces, due south of ω Psc, and, due to precession, slowly drifting below the western fish towards Aquarius.

Piscis Austrinus
Piscis Austrinus (IPA: /ˈpʌɪsɪs ˈɒstrinəs/) or Piscis Australis (IPA: /ˌɒsˈtrɑːlis/, Latin: southern fish) was one of the 48 constellations listed by Ptolemy, and is also one of the 88 modern constellations. Its only bright star is Fomalhaut.
Prior to the twentieth century, the constellation was also known as Piscis Notius, a name used to distinguish it from Pisces and the later introduced Piscis Volans (the flying fish).

Sagitta
Sagitta (IPA: /səˈdʒiːtə/, Latin: arrow) is the third-smallest of all constellations (only Equuleus and Crux are smaller). Ptolemy included it in his list of 48 constellations. At that time, however, it was even smaller, spanning only about 4 sq. deg. It's also on the list of 88 constellations now acknowledged by the IAU.
Being located not very far to the north of the equator, this constellation can be seen from everywhere except for the southernmost part of the world.
Sagitta is surrounded by the following constellations (beginning at the north and then continuing clockwise): the little fox Vulpecula, the mythological hero Hercules, the Eagle Aquila and the Dolphin Delphinus. Sagitta, the Arrow, is a very small constellation lying south of the Fox, Vulpecula, and north of the Eagle, Aquila, the third smallest constellation in the sky. It lies in the Milky Way, pointing eastward and shows clearly the shape of an arrow flying towards the Swan, Cygnus. Although ancient, is insignificant, for it has no star larger than the 4th magnitude, the Five Stars, its noticeable feature. Sagitta was its common title with all the Romans who mentioned its stars. [SLM p.349].
It has been regarded as the traditional weapon which Hercules used to kill the eagle (Aquila) of Jove that perpetually gnawed Prometheus' liver. The Arrow is located slightly above the Eagle. Some see the Arrow pointing to the east, others to the west. In conjunction with the story of Aquila it should be seen pointing to the west, aimed at the Eagle. Others believe the arrow to be the one shot by Hercules towards the adjacent Stymphalian birds (6th labor) who had claws, beaks and wings of iron, and who lived on human flesh in the marshes of Arcadia - Aquila the Eagle and Cygnus the Swan, and Lyra the Vulture - and still lying between them, whence the title Herculea. Eratosthenes claimed it as the arrow with which Apollo exterminated the Cyclopes. It sometimes was the Arrow of Cupid's bow.
Here are some of Sagitta's brighter stars:
α Sge: also known as Sham, this yellow bright giant star of spectral class G1 II (with 4.37m) lies at a distance of 610 light-years and together with β Sge (also 4.37m) forms either the feathers of the shaft or the two-pointed arrow once used in the Roman army.
γ Sge: this cool giant (M0 III, 3.47m) represents with the stars δ Sge and ε Sge the shaft. It lies at a distance of merely 170 light-years.
δ Sge: M2 II+A0 V (suspected visual double; probably single image, composite spectrum), 3.82m
ε Sge: G8 III, 5.66m, multiple star (4 components; component B is optical)
η Sge: this star of spectral class K2 III with 5.1m belongs to the Hyades moving group.

Sagittarius
Sagittarius (IPA: /ˌsædʒiˈteɪriəs/, Latin: archer) is a constellation of the zodiac, commonly depicted as a centaur drawing a bow. Sagittarius lies between Ophiuchus to the west and Capricornus to the east.
The constellation's brighter stars (from left to right on the map: τ, ζ, σ, φ, λ, ε, δ, η and γ2 Sagittarii) form an easily recognizable asterism called the Teapot. The Milk Dipper is part of the Teapot. The stars δ Sgr (Kaus Media), ε Sgr (Kaus Australis), ζ Sgr (Ascella), and φ Sgr form the body of the pot; λ Sgr (Kaus Borealis) is the point of the lid; γ2 Sgr (Alnasl) is the tip of the spout; and σ Sgr (Nunki) and τ Sgr the handle.
α Sgr (Rukbat) is not the brightest star of the constellation, having a magnitude of only 3.96 (not shown on the map as it is located below the map's southwestern corner, north is up).

Scorpius
Scorpius (Latin for scorpion) is one of the constellations of the zodiac. In western astrology it is known as "Scorpio". It lies between Libra to the west and Sagittarius to the east. It is a large constellation located in the southern hemisphere near the center of the Milky Way.
Scorpius contains many bright stars, including Antares (α Sco), β1 Sco (Graffias), δ Sco (Dschubba), θ Sco (Sargas), λ Sco (Shaula), ν Sco (Jabbah), ξ Sco (Grafias), σ Sco (Alniyat), τ Sco (also known as Alniyat) and υ Sco (Lesath).
The star once designated γ Sco (despite being well within the boundaries of Libra) is today known as σ Lib.
λ Sco and υ Sco, two stars at the end of the scorpion's tail that appear very close together, are sometimes referred to as the Cat's Eyes.

Scutum
Scutum (IPA: [ˈskjutəm], Latin: shield) is a small constellation, one of the 88 modern constellations. It is one of the few constellations (with Coma Berenices) that owes its name to an historical figure.
The original name Scutum Sobiescianum (Sobieski's Shield) was introduced in late 1683 by Hevelius as commemoration of the victory of the Christian forces led by Polish king and hero John III Sobieski in the battle of Vienna.
With an area of 109 square degrees, Scutum is the fifth smallest of the 88 modern constellations. It has few bright stars; the brightest star, α Scuti, has a magnitude of 3.85. The Milky Way runs through the constellation, and the Scutum star cloud can be found in the northeastern corner of the constellation.

Serpens
Serpens (IPA: /ˈsɚːpənz/, Latin: snake) is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy. Among the modern constellations it is unique in being split into two pieces, Serpens Caput (representing the head of the snake) to the west and Serpens Cauda (representing the tail) to the east. Between these two pieces lies the constellation of Ophiuchus, the serpent holder.
Since Serpens is regarded as one constellation despite being split into two halves, the ordering of Bayer designations goes in order of brightness among both halves.
Only one of the stars in Serpens is brighter than third magnitude, so the constellation is not easy to perceive. α Serpentis, named Unukalhai, is in the head part. δ Serpentis, also in the head, is a double star 210 light-years from Earth. θ Serpentis, in the tail, is also double.
Stars in the head include α, β, γ, δ, ε, ι, κ, λ, μ, π, ρ, σ, τ, χ and ω Serpentis. Stars in the tail include ζ, η, θ, ν, ξ, and ο Serpentis.

Sextans
Sextans (IPA: /ˈsɛkstanz/, Latin: sextant) is a minor equatorial constellation which was introduced in the 17th century by Johannes Hevelius.
Being a modern constellation, Sextans has no mythology associated with it. It was deigned to represent a sextant, an instrument that Hevelius made frequent use of in his observations.
Sextans is not a particularly bright constellation. It has only one star above the fifth magnitude, namely α Sextantis at 4.49m. The constellation contains a few double stars, including γ, 35, and 40 Sextantis. There are few notable variable stars.

Taurus
Taurus (IPA: /ˈtɔːrəs/, Latin: bull) is one of the constellations of the zodiac. It sits large and prominent in the winter sky, between Aries to the west and Gemini to the east; to the north lie Perseus and Auriga, to the southeast Orion, and to the southwest Eridanus and Cetus.
One of the few first magnitude stars in the sky, the bright red Aldebaran, sits in the middle of this constellation. The horns of the bull stretch off to the west, marked by β Tauri, traditionally shared with Auriga and ζ Tauri.

Triangulum
Triangulum (IPA: /trʌɪˈaŋgjələm/) is a small northern constellation whose three brightest stars, of third and fourth magnitude, form an elongated triangle. It is one of the 88 modern constellations, and also one of the 48 listed by Ptolemy.
Triangulum has no stars of the first magnitude. Its brightest stars are β Trianguli (3.00m) and α Trianguli (3.41m). Aside from the constelation, however, it is actually the largest galaxy in our "local group", or supercluster, next to the monstrous Andromeda 1 and our own Milky Way.

Ursa Major
Ursa Major (IPA: /ˈəːsə ˈmeɪdʒə/) is a constellation visible throughout the year in most of the northern hemisphere. Its name means Great Bear in Latin, and is associated with the legends of Callisto and Cynosura.
The seven brightest stars, located in the Bear's hindquarters and tail, form the well-known Big Dipper asterism. (In Britain, this asterism is known as the Plough.) Except for Dubhe and Alkaid, the stars of the Big Dipper all have proper motions heading towards a common point in Sagittarius. A few other such stars have been identified, and together they are called the Ursa Major Moving Group.
In addition to the Big Dipper, another asterism comes from Arab culture — the "leaps of the gazelle", a series of three pairs of stars:
ν and ξ Ursae Majoris, Alula Borealis and Australis, the "first leap";
λ and μ Ursae Majoris, Tania Borealis and Australis, the "second leap";
ι and κ Ursae Majoris, Talitha Borealis and Australis, the "third leap".
These stars are found along the southwest border of the constellation, the bear's toes.
Mizar, a star in the Big Dipper, forms the famous visual double star with Alcor.
W Ursae Majoris is the prototype of a class of contact binary variable stars, and ranges between 7.75m and 8.48m.
47 Ursae Majoris has a planetary system with two confirmed planets, 2.54 times and 0.76 times the mass of Jupiter.

Ursa Minor
Ursa Minor (IPA: /ˈəːsə ˈmʌɪnə/) is a constellation in the northern sky, the name of which means Smaller Bear in Latin. It is one of the 88 modern constellations, and was also one of the 48 listed by Ptolemy. It is notable as the location of the north celestial pole, although this will change after some centuries due to the precession of the equinoxes.
Ursa Minor is colloquially known as the Little Dipper because its seven brightest stars seem to form a ladle, or dipper shape. The star at the end of the dipper handle is Polaris, the North Star. Polaris can also be found by following a line through the two stars which form the end of the "bowl" of the Big Dipper, a nearby asterism found in the constellation Ursa Major.
Polaris (α UMi), the brightest star in the constellation, is a yellow supergiant shining at the brightness of 2.02m. It belongs to the rare class of Cepheid variable stars. Only a bit less bright is β UMi (Kochab), a 2.08m orange giant star.
The four stars in the "bowl" of the little dipper are unusual in that they are of second, third, fourth and fifth magnitude. Hence they provide an easy guide to determining what magnitude stars are visible, useful for city dwellers or testing your eyesight.

Virgo
Virgo (IPA: /ˈvəː(r)gəʊ/, Latin: virgin) is a constellation of the zodiac. Lying between Leo to the west and the Libra to the east, it is one of the largest constellations in the sky. It can be easily found through its bright α star, Spica.
The most prominent star in Virgo is Spica (α Vir), which was sometimes considered to represent an ear of wheat in Virgo's hand. Spica makes it easy to locate Virgo, as it can be found by following the curve of the Big Dipper to Arcturus in Boötes and continuing from there in the same curve ("follow the arc to Arcturus and speed on to Spica").
Other bright stars in Virgo include β Virginis (Zavijava), γ Vir (Porrima), δ Virginis (Auva) and ε Virginis (Vindemiatrix). Other fainter stars that were also given names are ζ Virginis (Heze), η Virginis (Zaniah), ι Virginis (Syrma) and μ Virginis (Rijl al Awwa).
The star 70 Virginis is one of the first known extrasolar planetary system with one confirmed planet 6.6 times the mass of Jupiter.
Due to the effects of precession, the First Point of Libra, (also known as the autumn equinox point) lies within the boundaries of Virgo very close to β Virginis. This is one of the two points in the sky where the celestial equator crosses the ecliptic (the other being the First Point of Aries, now in the constellation of Pisces.) This point will pass into the neighbouring constellation of Leo around the year 2440.

Vulpecula
Vulpecula (IPA: /vʌlˈpɛkjələ/, Latin: "little fox") is a faint northern constellation located in the middle of the Summer Triangle, an asterism consisting of the bright stars Deneb, Vega and Altair.
There are no stars brighter than 4th magnitude in this constellation. The brightest star in Vulpecula is α Vulpeculae, a magnitude 4.44m red giant at a distance of 297 light-years. The star is an optical binary (separation of 413.7") that can be split using binoculars. The star also carries the traditional name Anser, which refers to the goose the little fox holds in its jaws.
In 1967, the first pulsar, PSR B1919+21, was discovered in this little constellation by Antony Hewish and Jocelyn Bell, in Cambridge. While they were searching for scintillation of radio signals of quasars, they found a very regular signal consisting of pulses of radiation at a rate of one every few seconds. Terrestrial origin of the signal was ruled out because the time it took the object to reappear was a sidereal day instead of a solar day. This anomaly was finally identified as the signal of a rapidly rotating neutron star. The pulses arrive every 1.3373 seconds — too regular to be associated with any other object.

Taro Rae
Captain


Taro Rae
Captain

PostPosted: Sat Mar 10, 2007 2:57 pm


The Constellations of the Southern Sky

information from Wikipedia
Apus
Apus (IPA: /ˈeɪpəs/, Latin: bird of paradise or swallow, from Greek: απους, meaning "no-feet") is a faint southern constellation, not visible to the ancient Greeks. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603.

Ara
Ara (IPA: /ˈɑːrə/, Latin: altar) is a southern constellation situated between the constellations Scorpius and Triangulum Australe.
Ara's brightest star, β Arae, has an apparent magnitude of 2.9. γ Arae is a double star just south of β. μ Arae is believed to have at least four planets orbiting it, one of which may be rocky in nature.

Caelum
Caelum (IPA: /ˈsiːləm/, earlier Cæla Sculptoris , Latin: the sculptor's chisel is a minor southern constellation introduced by Nicolas Louis de Lacaille.
Since this is a southern constellation, invented in the 17th century, there is no pre-17th century mythology associated with it.

Carina
Carina (IPA: /kəˈriːnə/, Latin: keel) is a southern constellation which forms part of the old constellation of Argo Navis. It contains Canopus, the second brightest star in the night sky, and the supermassive star η Carinae which is embedded in the giant Eta Carinae Nebula (NGC 3372).
As the Milky Way runs through Carina, there are a large number of open clusters in the constellation. These include NGC 2516 and IC 2602, the latter popularly known as the "Southern Pleiades." The most notable object in Carina is NGC 3372, the Eta Carinae Nebula, host to Eta Carinae, one of the Milky Way's largest stars.

Centaurus
Centaurus (IPA: /ˌsɛnˈtɔːrəs/, Latin: centaur) is a bright constellation of the southern hemisphere. One of the largest constellations in the sky, Centaurus was one of the 48 constellations listed by Ptolemy, and also counts among the 88 modern constellations.
Centaurus contains Proxima Centauri, a red dwarf that is the nearest known star to the Sun as well as Alpha Centauri, which is a binary star to which Proxima Centauri is apparently gravitationally bound to form a triple star system.
In addition to Alpha Centauri, the 4th brightest star in the sky, a second first magnitude star, β Centauri, is part of Centaurus.

Cetus
Cetus (IPA: /ˈsiːtəs, ˈseɪtəs/, Latinized Greek: whale) is a constellation of the southern sky, in the region known as the Water, near other watery constellations like Aquarius, Pisces, and Eridanus.
This constellation's most notable star is Mira (ο Ceti), the first variable star to be discovered. Over a period of 331.65 days it can reach a maximum magnitude as high as 2.0m, one of the brightest in the sky and easily visible to the unaided eye, then drop to 10.1m and back again. Its discovery in 1596 by David Fabricius further dented the supposed unchangeability of the heavens and lent support to the Copernican revolution.
Other stars in the constellation include α Ceti (Menkar); β Ceti (Deneb Kaitos), brightest in the constellation; and τ Ceti, the 17th closest star to Earth.
The ecliptic passes close to the constellation boundary of Cetus, and thus the planets may be in this constellation for brief periods of time. This is even more true of asteroids, whose orbits usually have a greater inclination to the ecliptic than planets. The asteroid 4 Vesta was discovered in this constellation in 1807.

Chamaeleon
Chamaeleon (IPA: /kəˈmiːliən/, Latin: chameleon) is a minor southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603. In Australia it is sometimes unofficially called "the Frying Pan" when finding the south by the stars.
Since it is an invention of the 17th century and was not visible to early Mediterranean cultures, there is no mythology associated with it.
In 1999, a nearby open cluster was discovered centered on the star η Chamaeleontis. The cluster, known as either the Eta Chamaeleontis cluster or Mamajek 1, is 8 million years old, and lies 316 light years from Earth.
The constellation contains a number of molecular clouds (the Chamaeleon dark clouds) that are forming low-mass T Tauri stars. The cloud complex lies some 400 to 600 light years from Earth, and contains tens of thousands of solar masses of gas and dust.

Circinus
Circinus (IPA: /ˈsəːsɪnəs, -ənəs/, Latin: compass), is one of the small southern (declination −50 to −60 degrees) constellations. It represents a tool used in drawing maps and as such should not be confused with Pyxis, a constellation associated with a ship's compass.

Corvus
Corvus (IPA: /ˈkɔːvəs/, Latin: raven or crow) is a small southern constellation with only 11 stars visible to the naked eye (brighter than magnitude 5.5). It was one of the 48 constellations listed by Ptolemy, and also counts among the 88 modern constellations. δ, γ, ε, and β form the 'sail' asterism; and γ and δ serve as pointers toward Spica.

Crux
Crux (IPA: /ˈkrʊks/, Latin: cross), commonly known as the Southern Cross (Crux Australis, in contrast to the Northern Cross), is the smallest of the 88 modern constellations, but nevertheless one of the most distinctive. It is surrounded on three sides by the constellation Centaurus while to the south lies the Fly (Musca). Crux was originally thought of by ancient Greeks as part of Centaurus, but was defined as a separate asterism in the 16th century after Amerigo Vespucci's expedition to South America in 1501. Vespucci mapped the two stars, Alpha Centauri and Beta Centauri as well as the stars of the Crux. Although these stars were known to the ancient Greeks, gradual precession of the equinoxes had lowered them below the European skyline so that they were forgotten there. For example at the latitude of Athens in 1000 B.C., Crux was clearly visible, although it was low in the sky. However, by 400 A.D., most of the constellation never rose above the horizon for Athenians.
With the lack of a significant pole star in the southern sky (Sigma Octantis is closest to the pole, but is too faint to be useful for the purpose), two of the stars of Crux (Alpha and Gamma, Acrux and Gacrux respectively) are commonly used to mark south. Following the line defined by the two stars for approximately 4.5 times the distance between them leads to a point close to the Southern Celestial Pole.
Alternatively, if a line is constructed perpendicularly between Alpha Centauri and Beta Centauri, the point where the above line and this line intersect marks the Southern Celestial Pole. The two stars are often referred to as the "Pointer Stars" or "White Pointers", allowing people to easily find the top of Crux.
Contrary to some people's belief, it is not opposite Ursa Major. In fact, in tropical regions both Crux (low in the South) and Ursa Major (low in the North) can be in the sky from April to June. It is exactly opposite Cassiopeia on the celestial sphere, and therefore cannot be in the sky with the latter at the same time. For locations south of 34° southern latitude Crux is always completely in the sky.
If you use the Southern Cross to find south, be careful to distinguish it from the False Cross. The Southern Cross is somewhat kite-shaped, and it has a fifth star (ε Crucis). The False Cross is diamond-shaped and does not have a fifth star like ε Crucis.

Dorado
Dorado (IPA: /dəˈrɑːdəʊ/, Spanish: mahi-mahi or dolphin-fish) is a southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603. It is also known as Xiphias or the Sword-fish. The name Dorado is not really a Latin word, but it is treated like a feminine proper name of Greek origin whose nominative singular ends in -o (like Io or Callisto) and whose genitive ends in -us.
Dorado is notable for containing most of the Large Magellanic Cloud, the remainder being in the constellation Mensa. The South Ecliptic Pole also lies within this constellation.
Notable Stars:
S Dor 9.721 – hypergiant in the Large Magellanic Cloud, S Dor variable prototype
Supernova 1987A is the closest supernova since the invention of the telescope.
The variable star R Doradus 5.73 – has the largest known size of any star.
HE 0437-5439, a hypervelocity star escaping from the Milky Way/Magellanic Cloud system.

Fornax
Fornax (IPA: /ˈfɔːnaks/, Latin: furnace) is a southern constellation which was first introduced by Nicolas Louis de Lacaille under the name Fornax Chemica (Latin for chemical furnace), representing a small solid-fuel heater formerly used for heating chemical experiments.
The Fornax Dwarf galaxy is Fornax.
The Hubble Ultra Deep Field is located within Fornax.
At a meeting of the Royal Astronomical Society in Britain, a team from University of Queensland described 40 unknown "dwarf" galaxies in this constellation.
They also described Fornax as being "on Earth's doorstep", because α Fornacis is only about 46 light-years away.
Follow-up observations with the Hubble Space Telescope and the European Southern Observatory's Very Large Telescope revealed that Ultra Compact Dwarfs are much smaller than previously known dwarf galaxies, about 120 light-years across. "Tens of millions of stars are squashed into what is a tiny volume by galaxy standards," the observatory said in a statement. The Fornax Cluster, a small cluster of galaxies lies primarily in the constellation Fornax.

Grus
Grus (IPA: /ˈgrʌs, ˈgruːs/, Latin: crane) is a southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603. An alternative name for this constellation, Phoenicopterus (Latin for flamingo), was used briefly in England during the 17th century.

Horologium
Horologium (IPA: /ˌhɔːrəˈləʊdʒiəm/, Latin: clock) is one of the lesser southern constellations (declination around −60 degrees).
Originally named Horologium Oscillitorium by Abbé Nicolas Louis de Lacaille, the constellation name has since been shortened to be less cumbersome. Horologium Oscillitorium was to honour the inventor of the pendulum clock, Christian Huygens.
Since it was invented in the 17th century, and not visible in the Mediterranean there is no earlier mythology associated with it.

Hydrus
Hydrus (IPA: /ˈhʌɪdrəs/, Latin: Hydra, also referred to as "male Hydra" or "little Hydra") is a minor southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603.
It should not be confused with Hydra.

Indus
Indus (IPA: /ˈɪndəs/) is a southern constellation that is supposed to represent an American Indian.
Epsilon Indi is one of the closest stars to Earth, approximately 11.82 light years away.

Lepus
Lepus (IPA: /ˈlɛpəs, ˈliːpəs/, Latin: hare) is a constellation, lying just south of the Celestial equator, below the constellation Orion, and possibly representing a hare being chased by Orion the hunter. Lepus was one of Ptolemy's 48 constellations, and counts also among the 88 modern constellations.
This constellation should not be confused with Lupus.

Lupus
Lupus (IPA: /ˈluːpəs/, Latin: wolf) is a southern constellation. It is one of the 88 modern constellations and was also one of the 48 in Ptolemy's Almagest. It is between Centaurus and Scorpius.
Lupus has no extremely bright stars, but has around thirty stars of second and third magnitude and 70 of greater than sixth, including a number of binary or multiple stars. Among the stars which make up the constellation figure, only a few are named stars, the brightest is α Lupi, or Men, a blue giant. β Lupi has the name Ke Kouan.

Mensa
Mensa (IPA: /ˈmɛnsə/, Latin: table) is a southern constellation which was first introduced by Nicolas Louis de Lacaille under the name Mons Mensae (Latin for table mountain). This specifically refers to Table Mountain in South Africa, where Lacaille made important early observations of the southern sky. It contains no bright stars, with Alpha Mensae its brightest star at a barely visible magnitude 5.09, making it the faintest constellation in the entire sky, but it does contain part of the Large Magellanic Cloud (the rest being in Dorado).
The constellation covers a keystone-shaped wedge of sky stretching from approximately 4h to 7.5h of right ascension, and −71 to −85.5 degrees of declination. Other than the south polar constellation of Octans, it is the most southerly of constellations. As a result, it is essentially unobservable from the Northern Hemisphere. Besides those already mentioned, its other neighbouring constellations are Chamaeleon, Hydrus and Volans.
The first images taken by the Chandra X-Ray Observatory were of PKS 0637-752, a quasar in Mensa with a large gas jet visible in both optical and x-ray wavelengths.
Alpha Mensae is a solar-type star (class G5 V) 33 light-years from Earth, and is considered a good prospect for harboring an Earth-like planet. Pi Mensae, on the other hand, while also solar-type (G1) and at 59 light-years, has been found to have a large gas giant in an eccentric orbit crossing the habitable zone, which would effectively rule out the existence of any habitable planets.

Microscopium
Microscopium (IPA: /ˌmʌɪkrəˈskɒpiəm/, Latin: microscope) is a small southern constellation introduced by Nicolas Louis de Lacaille. Its stars are very faint.

Musca
Musca (IPA: /ˈmʊskə/, Latin: fly) is one of the minor southern constellations. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603.
The soft X-ray transient Nova Muscae 1991 is a binary object consisting of a star and a black hole. During the 1991 outburst which led to its discovery, radiation was produced through a process of positron annihilation. Musca also contains the unusual planetary nebula NGC 5189, located about 3,000 light years from earth. Its uniquely complex structure resembles a miniature crab nebula. Also within the constellation is the Hourglass Nebula (MyCn 1 cool at a distance of 8,000 light years. The comparatively old globular cluster NGC 4833 near Delta Muscae is 21,200 light years distant and somewhat obscured by dust clouds near the galactic plane. The globular cluster NGC 4372 near Gamma Muscae is fainter and likewise partially obscured by dust, but spans more arc minutes.

Norma
Norma (IPA: /ˈnɔːmə/, Latin: normal, as in right angle), is a small and inconspicuous constellation that lies in the southern hemisphere between Scorpius and Centaurus. The Milky Way passes through it. In English the constellation is variously known as The Rule, The Carpenter's Square, The Set Square and The Level. It was formally known as Norma et Regula, a Latin translation of Lacaille's original French name for the constellation, L'Équerre et La Règle, meaning "The Set Square and The Ruler".
Norma has no α or β star; its brightest star, γ2 Normae, is only of magnitude 4.0. Among the constellation's principal stars are the following:
γ1 Nor and γ2 Nor comprise an easy optical double. γ2 Nor is itself a close optical double (HJ 4841).
ε Nor: a relatively fixed binary star (HJ 4853). The two components are of magnitude 4.54 and 6.68; the separation is 22" in PA 335°. The fainter component is itself a spectroscopic binary (mag 6.68 and 7.12).
ι1 Nor: a multiple star. The AB (mag 5.6 and 5. cool pair comprise a rapid binary with a period of 26.9 years; in 2000 the separation was 0.5" in PA 285°. Component C, of magnitude 8.75, is 11" away in PA 242°; it is not a physical member of the system, being only 55 light-years away, while the AB pair lie at a distance of more than 140 ly.
μ Nor is suspected of being an Alpha Cygni variable, with a range of 4.87–4.98. It is of spectral type O9.7 Iab.
R Normae is a Mira variable. Its visual range is 6.5–13.9 and its average period is 507.5 days.
S Normae is a well-known Cepheid variable with a range of 6.12–6.77 and a period of 9.75411 days. It is located at the centre of the open cluster NGC 6087.

Octans
Octans (IPA: /ˈɒktanz/, Latin: octant) is an inconspicuous constellation introduced by Nicolas Louis de Lacaille. It is notable mainly as the location of the south celestial pole. Its star Sigma Octantis (σ Oct) is the closest naked-eye star to the pole, but it is so faint that it is practically useless as a polar star for navigation purposes. Fortunately, the constellation Crux, the Southern Cross, points at the pole.
The constellation is circumpolar to the South Celestial Pole, so it can be seen in Southern Hemisphere skies during the evening in any month of the year. The Right Ascension and month of best visibility given are for the three brightest stars, which are at their highest in the sky during the evening in November.

Pavo
Pavo (IPA: /ˈpeɪvəʊ/, Latin: peacock) is a southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603.
In Australia "the Saucepan" is sometimes used as an informal name for part of the constellation of Pavo, when finding the south by the stars.
The most famous star in the constellation is δ Pavonis, a nearby Sun-like but more evolved star. φ2 Pavonis, another Sun-like star has an unconfirmed extrasolar planet.

Phoenix
Phoenix (IPA: /ˈfiənɪks/) is a minor southern constellation, introduced by Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman, and popularized by Johann Bayer's Uranometria in 1603.
There are only thirteen stars in the whole constellation which are brighter than magnitude 5.0.
The constellation stretches from roughly −39° to −57° declination, and from 23.5h to 2.5h of right ascension. This means it is generally invisible to anyone living north of the 40th parallel in the Northern Hemisphere, and remains low in the sky for anyone living north of the equator. It is easily visible from locations such as Australia and South Africa during Southern Hemisphere summer.
Phoenix is associated with the minor Phoenicids meteor shower of December 5th.

Pictor
Pictor (IPA: /ˈpɪktə/, Latin: easel) is one of the minor southern (declination -50° to -60°) constellations.
Pictor is a small, faint constellation located between brilliant Canopus and the Large Magellanic Cloud.
Pictor has attracted attention in recent years because of its second-brightest star β Pictoris, 62.9 light-years distant, which is surrounded by an unusual dust disk rich in carbon.
Kapteyn's Star, a nearby red dwarf at the distance of 12.78 light years, is the closest halo star known.

Puppis
Puppis (IPA: /ˈpʊpis/, Latin: poop deck) is a southern constellation. It is the largest of the three parts into which Argo Navis was split.

Pyxis
Pyxis (IPA: /ˈpɪksis/, Latin: box) is a minor southern constellation introduced by Nicolas Louis de Lacaille under the name Pyxis Nautica.
It is perhaps supposed to represent the compass of Argo Navis, though the Argo could hardly have had a compass, as the ancient Greeks are not believed to have used compasses for navigation. Note that Pyxis was not formally a part of Argo Navis; that is, the stars in it have their own independent Bayer designations (unlike Carina, Puppis and Vela which retained and split among themselves the Bayer designations from Argo).
It should not be confused with the constellation Circinus, which represents the type of compass used by a draftsman or cartographer.
Since is it a modern constellation, it has no independent pre-17th century mythology associated with it.

Reticulum
Reticulum (IPA: /rəˈtɪkjələm/, Latin: reticle), is one of the minor southern constellations. It was introduced by Nicolas Louis de Lacaille to commemorate the reticle, which was a scientific instrument used to measure star positions.
Since it was introduced in the 18th century, there is no earlier mythology associated with it.

Sculptor
Sculptor (IPA: /ˈskʊlptə/) is a minor southern constellation which was introduced by Nicolas Louis de Lacaille. He originally named it after a sculptor's studio, but the name was later shortened.
As it was introduced during the 17th century, there is no mythology associated with it.
No bright stars brighter than 3rd magnitude are located in Sculptor. The brightest star is α Sculptor, a SX Arietis-type variable star with the magnitude of only 4.31m. This is explained by the fact that Sculptor contains the south galactic pole where stellar density is very low.

Telescopium
Telescopium (IPA: /ˌtɛliˈskɒpiəm/, Latin: telescope) is a minor southern constellation identified and named by Nicolas Louis de Lacaille, the 18th century French astronomer, a student of the southern skies.
Since it was introduced in the 17th century, and, as a southern constellation, was not visible to Mediterranean culture, there is no earlier mythology associated with it.

Triangulum Australe
Triangulum Australe (IPA: /trʌɪˈaŋgjələm ɒsˈtreɪliː/) is a small southern constellation whose three brightest stars, of second and third magnitude, form an approximately equilateral triangle. This constellation was introduced by Johann Bayer in 1603. Since it was introduced in the 17th century, there is no earlier mythology associated with it.

Tucana
Tucana (IPA: /tuːˈkɑːnə, -ˈkeɪnə, -ˈkanə, tjuː-/, Latin: toucan) is a southern constellation. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603.
Since it was invented in the 17th century, there is no earlier mythology associated with it.

Vela
Vela (IPA: /ˈviːlə/, Latin: sails) is a southern constellation, one of the four parts into which Argo Navis was split (the others being Carina, Puppis and Pyxis).
The brightest star in the constellation, γ Velorum, is a bright 1.75m supergiant star. The star is actually quintuple, the primary component is famous for being the brightest Wolf-Rayet star in the sky.

Volans
Volans (IPA: /ˈvəʊlanz/, Latin: flying fish or "flying thing") is a constellation of the southern sky. The constellation was one of twelve constellations created by Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597, and it first appeared in Johann Bayer's Uranometria of 1603. The current name of the constellation is a shortening of the original name Piscis Volans, "flying fish".
Since Volans was created in the 17th century, there is no earlier mythology associated with it.
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