Athavulf
Lol.. "blackness"? Don't you realize there is no such thing as nighttime except for within our little Hominid brains while we waste away our years stuck on this planet. The real deal is that space is full, not empty. There is no such thing as nothing. What you are suggesting somehow about night making the universe limited is almost as absurd as me saying there
may have been giants with advanced technology over 14,000 years ago... -_-
I'm beginning to believe you accept such theories because you don't
understand physics in the slightest. I'm going to have to go slow, tell me if I go too fast.
Think of the Earth Floating through space, all around it is Space. The density of the space around it is much less dense than either the atmosphere of the planet itself or the star it orbits.(unless you believe in the ether.) This is what is meant by space being "empty". Not that nothing is inside of it, but that it is supremely less dense than the Earth's atmosphere or crust, mantle, ect.
Stand on the Planet's surface, and look up. Right now it's noon, and the sun is high above your head, you can't see it, but light from stars all over the universe, and our own galaxy, is shinning down on you. But why isn't it visible? The light from our own star outshines them, so they aren't visible to the naked eye. The planet rotates, and now you are on the side facing away from the star. I'd like to take this time to say that night ISN'T caused by the Earth's Shadow. (Lunar Eclipses are though.) It is caused by the Earth's rotation taking it away from the light source. Think of a light bulb in the middle of the room. the side of you not facing the light bulb is dark.
Source Back to the main point, the sun had now set. Now all of the light from the universe rains down on you and to your eyes. Some of it is blocked by our cushy atmosphere, but you can still see plenty of stars. But wait, there is the "darkness" of space inbetween those star points? Why is that so?
The better question is, why is the night dark? Sounds silly, but it's more profound than it seems.
To explain this, I'll need to make sure you understand some concepts. Light is like a time capsule. It continues on from the point of it's creation forever. Any light ever created is heading towards us, as long as it's pointed in our direction. When we look at stars. we are seeing them as they were when the light was created. What I mean is, if the star is 1 light year away, it took one year for the light to get here, and the light that's getting to us now, is how the star looked when the light was created 1 year ago. Get it?
Now we get to the problem of the blackness. Since light from any star that has ever existed will shine towards us (as stars radiate in 360 degrees) All of this light should get to us, even when the main light source of the sun is no longer visible. But there is no light? Why? Why is the "blackness" inbetween stars not light like the stars themselves? To make an example, so I am perfectly clear, once again imagine light bulbs. A whole room full of them. All of these are all the stars the ever existed, so even when you turn off the light from the one in the middle of the room, there is still plenty of light around. So the nighttime
wouldn't be dark, in fact there would be no "night time" as we know it. But there is darkness so why is it so? If the universe is infinitely old, then all of this light would be around, because all of these stars would have existed. But there isn't. Maybe the universe is infinitely large? If so then the light just hasn't gotten to us yet, that's why we can't see it. But if it IS infinitely large, why does it "act" like it has an beginning?
To be succinct, where does the background radiation come from? The buzz of microwaves that permeates all of space, in between you and me, and entire galaxies. It must come from somewhere, and more importantly we still can't figure out why the night is dark. To explain this conundrum, we do something scientists do, we make a hypothesis and see whether it fits observations. Let's go with the Big Bang, a misnomer, but a good enough name. All of the universe exists as a infinitesimally small and dense ball of, well everything. Energy pure energy. All of a sudden, this ball expands, and extremely quickly. This expansion would leave a "print" on the larger version of the universe, as the ambient energy in the ball would have been "stretched" and gone from extremely high energy to lower energy. If we were to look at this universe, not only would we see this low energy "imprint" all over the place, BUT there would be blackness.
All matter didn't "explode" into a waiting universal void, the WHOLE universe time, space(the three dimensions), and matter all expanded at once into existence. Do you understand?
To finish this explanation, we look at our own universe. The big bang not only explains the background "buzz" of microwave radiation, but it's existence also explains why the night is dark.
I hope you get what 'm talking about, cause this is about as watered down as I can make it...I guess I can try again if you need me too.