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How can we observe things over 40 billion light years away if they've only been around to emit light for 13 billion years?
by skykooler 6y ago
How can we observe things over 40 billion light years away if they've only been around to emit light for 13 billion years?
- wffurr 6y agohttps://en.m.wikipedia.org/wiki/Observable_universe#Misconceptions_about_its_size https://en.m.wikipedia.org/wiki/Observable_universe#Misconce...
- function_seven 6y agoThe universe has been expanding ever since the Big Bang. Things that are very far away are moving away from us at speeds "faster" than light. No, they're not violating the cosmic speed limit. The fabric of spacetime itself is expanding everywhere, and that makes objects at very large distances apart get even further apart faster than a lightspeed traveler could move them. https://www.space.com/33306-how-does-the-universe-expand-faster-than-light.html https://www.space.com/33306-how-does-the-universe-expand-fas...
- vkou 6y agoThey were closer to us when they emitted that light. They've since moved further away.