Cosmology

The surprisingly bright galaxy, called HD1, may contain some of the universe’s first stars, as well as a supermassive black hole

Called Earendel, the star is nearly 13 billion light-years from Earth

Fresh data suggest instrumental errors may have mimicked a purported signal from the universe’s first stars

The observatory’s unprecedented infrared measurements might at last bridge a growing rift between astronomers over how fast the universe is expanding

The scientists found several previously hidden galaxies that date back to 13 billion years ago—and many more might be missing from our current census of the early universe.

New revelations about how galaxies collide show what might happen when our galaxy meets Andromeda

Developing quantum-gravity technologies may elevate us to a “class A” civilization, capable of creating a baby universe

Ewine van Dishoeck received the Kavli Prize in Astrophysics in 2018 for elucidating the life cycle of interstellar clouds and the formation of stars and planets. What other mysteries of space are left to be uncovered?

Hints of a previously unknown, primordial form of the substance could explain why the cosmos now seems to be expanding faster than theory predicts

Fred Hoyle and George Gamow were brilliant iconoclasts who reached opposite conclusions about the expanding universe (for the record, Gamow was right)

A battle for the future of American stargazing is about to begin—and the stakes are sky high

If such an object a mere 1,000 times bigger than an atom passed through your body, the result would not be pretty