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Ask Ethan: How far is the edge of the Universe from the farthest galaxy? (Synopsis)

6 May 2017, 14:02 UTC
Ask Ethan: How far is the edge of the Universe from the farthest galaxy? (Synopsis) NASA, ESA, and P. Oesch (Yale University)
(200 words excerpt, click title or image to see full post)

When we look to the deepest reaches of space, we can look for the “first” of any type of object. The first galaxy, the first star, the first light from the CMB, or even the first signals from the Big Bang, like gravitational waves. Yet these signals all have very different redshifts from one another, and perhaps more puzzlingly, lie at extraordinarily different cosmic distances from us.

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