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Originally Posted by Rasczak  I don't know if this is true about the big bang theory, but I thought I heard they also believe that just as everything was blown out, it will eventually collapse back in. That means, things are sort of like when you throw a ball up in the air and there's that point between rising or falling. That's where we exist. |
Ah, I forgot the term for this but it is the ratio of energy to mass. If the energy is greater than the mass, the universe expands forever. If it's less, the universe eventually collapses. If they're equal, the universe expands forever but it does so at the least possible rate.
This is also called Forced Damped Simple Harmonic Motion (FDSHM).
And it relies on certain assumptions:
1. The mass in the universe does not change.
2. The energy in the universe does not change.
3. The universe is a spring (a bouncy spring not the water type).
But observations have concluded that:
1. The universe is generating more matter.
2. The universe is generating more dark matter.
3. The universe is generating more energy.
4. The universe is generating more dark energy.
And everyone is arguing over the rates. In other words, nobody knows even if you can throw a ball into the air. They're not sure that matter and dark matter are different. (And the same for the energies.)
I beginning to think the place "where we exist" is somewhere between Nirvana and a bad joke. (I'm leaning toward the bad joke.)