Suicidesoldier#1
Tranquil Surrogate
Suicidesoldier#1
Tranquil Surrogate
Suicidesoldier#1
Eventually the universe will expand so much that stars are unable to reform and it will be impossible to survive without energy.
The universe is already expanding faster than the speed of light and we will be unable to reach other stars in order to power ourselves, and we will eventually die.
Unless we can bend space or find some other form of energy.
The universe was created from nothing, so it's possible to create something from nothing, as with the big bang, but ultimately unless we can figure out how to do that we've only got a few billion years at most.
You're joking right? Stars aren't individually expanding faster than the speed of light (which isn't even physically possible). Galaxies are moving away from each other at a fast rate, yes, but this still doesn't mean much because there is more than enough dark matter to hold the superstructures of the universe together for hundreds of billions of years yet.
The universe is only 14 billion years old. We haven't even yet witnessed the advanced evolution of a red dwarf star because they have lifespans of at least 100 billion years. The universe is still extremely young.
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unless we can figure out how to do that we've only got a few billion years at most.
You speak of a few billion years as if its trivial. If we somehow survive until then we will be the gods of our own existence.
Uh... uh...
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Even if we assume that a galaxy will remain together eventually all the stars will burn out and the radiation will be lost to space.
xp
But stars are moving apart, as well; space is expanding, not necessarily stars are moving.
xp That's assuming our universe will remain at less than critical density.
Even when stars burn out, it's not the end of them. For a high mass star, their supernova will create a range of heavy elements that will eventually contribute to the formation of new star systems in the nearby region. For low mass stars, their outer shells will be ejected as they enter the planetary nebula phase of their life (after switching from hydrogen fusion to helium or carbon fusion), and that debris will drift until forming an accretion disk or a protoplanetary disk.
Space is expanding, but that doesn't mean individual stars are increasing distance from one another. The expansion of space is only really noticeable on massive scales - galaxy clusters and above. For anything below that, the power of gravity is more than enough to hold structures together within the expanding universe.
Put simply, it would take the enormous mass consumption of many black holes to drain the matter out of clusters of galaxies such that gravity and accretion can no longer form stars within them, as even when stars die they simply rebuild themselves with surrounding matter. I'm not saying the universe won't eventually die, but it won't be for hundreds of billions - probably trillions of years.
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