An image of the extremely distant Universe, where many of the galaxies are tens of billions of light years away. (NASA, ESA, R. Windhorst, S. Cohen, and M. Mechtley (ASU), R. O’Connell (UVa), P. McCarthy (Carnegie Obs), N. Hathi (UC Riverside), R. Ryan (UC Davis), & H. Yan (tOSU))

If The Universe Is 13.8 Billion Years Old, How Can We See 46 Billion Light Years Away?

Distances in the expanding Universe don’t work like you’d expect. Unless, that is, you learn to think like a cosmologist.

There are a few fundamental facts about the Universe — its origin, its history, and what it is today — that are…