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:D is the universe expanding, or revealing more of itself? if the universe is expanding at the speed of light, doesn't that imply that just light is reaching us
by vectorEQ 7y ago
:D is the universe expanding, or revealing more of itself? if the universe is expanding at the speed of light, doesn't that imply that just light is reaching us more from further away places? sorry to be off topic but that comment gave me this brainfart.
- philipov 7y agoThe universe is revealing more of itself as light reaches us from farther away, but because the universe is both expanding and that expansion is accelerating, there is a maximum distance we will ever be able to see: the Hubble Distance. I don't think the universe is old enough for light to reach us from that far yet, which is why we can still see the cosmic microwave radiation, but give it a few trillion years, and we won't even be able to see other galaxies because they will recede from us, redshift, and disappear.
- swebs 7y agoNo, there's actually more space constantly being added to the fabric of spacetime. So if you take 1 cubic meter of space, eventually it will become 1.01 cubic meters, then 1.02, etc. This isn't noticeable at distances within the galaxy, but it is very noticeable when observing distant galaxies. https://en.wikipedia.org/wiki/Metric_expansion_of_space https://en.wikipedia.org/wiki/Metric_expansion_of_space