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originally posted in: Ask me anything about Astronomy
4/6/2016 4:45:11 AM
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Ok, that's cool. Just wondering, then why do systems move away from each other so fast. Also, i guess you don't believe in the big crunch
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  • Edited by The Cellar Door: 4/6/2016 4:47:25 AM
    Assuming by systems you mean galaxies and clusters, the space between them is exponentially expanding faster than the speed of light. And no. Heat death.

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  • Exactly, if there was no explosion, what gave them the velocity to move so fast?

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  • Spatial expansion. They're not moving away from each other, the space between them is growing at an accelerating rate.

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  • If how does nothing expand on its own? Much less move entire systems?

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  • It's not pushing anything. The space itself is literally getting larger. Why this occurs is a very great question, and I would love for you to help the effort in figuring out the answer. Nobel prize, millions of dollars, hot chix, the whole package deal comes with the cosmological constant.

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