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TripleATeam t1_j1gki0d wrote

Reply to comment by AnnonBayBridge in Did you know it will still take 46 billion years to cross the universe at the speed of light? 65 mph = 4.8 * 10^17 years! by NotAndroid545

Not only what everyone else says, but space seems to expand at a constant value per unit of volume. Thus the more space there is, the faster it expands. Thus eventually (as far as we know rn) we'll stop seeing other galaxies. We'll be alone.

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f_d t1_j1gva4w wrote

The Local Group is bound together by gravity. It should stay together as long as the fundamental forces keep working like before. The rest of the universe outside that threshold will keep stretching away endlessly.

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TripleATeam t1_j1gvm96 wrote

I thought it was just the galaxy that was bound tightly enough and the local group would eventually go as well? Huh. I guess I learned something.

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