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Did Our Universe’s Structure Grow From The Top-Down Or From The Bottom-Up?

This composite Hubble image is a panorama constructed from many different filters and observations pointed at the same regions of the sky. Even a relatively small region of space such […]

Starts With A Bang

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

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), […]

Starts With A Bang

Earliest, brightest galaxies shine a ghostly green in surprising new find

Some rare galaxies exhibit a green glow thanks to the presence of doubly ionized oxygen. This requires UV light from stellar temperatures of 50,000 K and above. Image credit: NASA, […]

Starts With A Bang

Ask Ethan: How can we see so far away in such a young Universe?

An image of the extremely distant Universe, where many of the galaxies are tens of billions of light years away. Image credit: NASA, ESA, R. Windhorst, S. Cohen, and M. […]

Starts With A Bang

Ask Ethan #70: Does the Universe have a center?

Image credit: NASA, ESA, R. Windhorst, S. Cohen, M. Mechtley, and M. Rutkowski (Arizona State University, Tempe), R. O’Connell (University of Virginia), P. McCarthy (Carnegie Observatories), N. Hathi (University of […]