White dwarfs are the compact remnants of stars that have stopped nuclear burning, a fate that will eventually befall our sun.

Uranus' moon Ariel could have had liquid water 100 miles deep, hidden under its icy crust, possibly making it yet another ...

Astronomers from Curtin University in Australia and elsewhere have performed radio observations of a tidal disruption event ...

Because the Earth is doing the work of increasing the Moon's momentum, the Earth's rotation slows down in turn, as its momentum goes to the Moon. To put it another way, as the Moon's orbital momentum ...

In the hunt for extraterrestrial life, we usually look for planets orbiting sun-like stars and icy moons. But there is ...

Phobos is the larger and innermost of Mars' two moons, and it's a fascinating celestial body. It's small, irregularly shaped, and orbiting just about 6,000 kilometers above the surface of the Red ...

A 50-million-light-year-long flow of hydrogen gas has been observed linking two tiny galaxies 50 million light-years away, ...