The smashups are thought to have occurred at least 100 million years ago, but the moons they created are new to astronomers.

The four exoplanets orbit Barnard’s Star so closely that their years last only a few Earth days. They are probably rocky and, ...

Astronomers have traced a starnge blast of radiowaves that repeats every 2 hours back to a dead star white dwarf magnetically ...

Water was present just a couple hundred million years after the Big Bang, according to a new study, shaking up the timeline ...

“Before the first stars exploded, there was no water in the Universe because there was no oxygen,” said Daniel Whalen, a ...