Amid the season with at least one meteor shower occurring every night, interstellar comet 3I/ATLAS may become visible to us ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

White dwarfs may still host habitable planets. Conditions like tidal heating and migration shape their potential for life. The Sun will eventually die. This will occur when it exhausts the hydrogen ...

The debate over the existence of extraterrestrial life touches literature, religion, and science in 17th century Europe.

The dwarf planet Pluto and its five known natural satellites (Charon, Styx, Nix, Kerberos, and Hydra) may be frigid, but ...

This was an unexpected and coincidental discovery of a small, icy, egg-shaped planet in the outermost reaches of our solar ...

Planetary scientists believe they can now predict the green glow of an aurora in the night sky above Mars, and they have the images to prove it. The ...

In 40,000 years, long after its mission is over, NASA's Voyager 1 spacecraft will have a close encounter with Gliese 445. It ...

When 1I/'Oumuamua was first spotted in 2017, astronomers quickly determined that it came from outside the solar system. But ...