The star T CrB flares up every 80 years. A document from 1217 could help confirm its regularity.
Astronomers using the James Webb Space Telescope have discovered a clump of ancient galaxies that may be the oldest strand of the "cosmic web" ever detected.
The cold and mysterious Oort cloud at the edge of our solar system may be hiding a rogue exoplanet, new research suggests.
Scientists have discovered a weird celestial object that's blurring the line between planet and star.
On its face, the Apollo 11 quarantine protocol looked sensible. But the new research suggests that NASA's "planetary protection" efforts were largely for show.
Here's what we know (and don't know) about China's mysterious space plane, which just landed after nine months in orbit on a secret mission.
Students at Carnegie Mellon University are sending America's first robotic lunar rover to the moon this May, beating NASA to the punch by about a year.
Scientists have observed that some of Neptune's Trojan asteroids are deep red, possibly revealing what asteroids may have been like in the early days of the solar system.
Auroras don't just exist on Earth. Here's what we know about auroras on other planets in the solar system.