Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

Fly about 2,600 light-years to Hubble Space Telescope imagery of the Cygnus loop nebula. See images from 2001 and 2020.

Astronomers have identified three ultra-massive galaxies -- nearly as massive as the Milky Way -- already in place within the first billion years after the Big Bang. This surprising discovery was made ...

The Hubble Space Telescope has captured two tangled galaxies, whose interactions have caused knots to form in the "queen's ...

Since the discovery of the acceleration, theorists have calculated that the universe will continue to expand faster and ...

As a woman, she couldn’t use the observatory’s telescope. Rather, she studied photographic plates taken with Harvard’s Boyden ...

When we go backwards in time through the history of the cosmos, the distances and volumes shrink, while the average energy ...

How would you like to see the farthest thing visible to the naked eye? It’s possible, but you’ll need to bundle up and sit ...

How would you like to see the farthest thing visible to the naked eye? It’s possible, but you’ll need to bundle up and sit ...