Although astronomers have found thousands of exoplanets, the number of confirmed exomoons—and exorings—is still zero. But ...

Interstellar comet 3I/ATLAS has steadily been making its exit ever since it had a rendezvous at the end of October with the sun.

America was winning the race to find Martian life. Then China jumped in. In July 2024, NASA’s Perseverance rover came across a peculiar rocky outcrop on Mars covered in strange spots. On Earth, these ...

From gamma ray bursts and supernova explosions to black holes and unknown alien life, we rank the scariest things in the ...