The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space ...

Astronomers are increasingly finding planets that do not simply circle their stars in neat, clockwork ellipses but instead trace out paths that look more like intricate choreography. The latest ...

For centuries, Europeans thought that eternal daylight saturated the cosmos. The shift to a dark universe has had a profound ...

"This observation also demonstrates that we can use Webb to find individual stars when the universe was only 5% of its ...

Astronomers have spotted the longest gamma-ray burst ever seen, a cosmic explosion that lasted seven hours — and they ...

NASA has visualized the cataclysm, which is thought to have caused a mysterious eruption of gamma rays captured by telescopes ...

Welcome to the final winter edition of the Icebox! After three years of keeping it cool with lots of video games, anime and just a hint of Venom, the Icebox series is nearing the end of its time here ...

Astronomers have captured images of two stellar explosions—known as novae—within days of their eruption and in unprecedented ...

The fifth day of the 18th annual Space Telescope Advent Calendar features a close view of a distant and colorful spiral ...

The twin telescopes of the Gemini Observatory mark 25 years of discovery as students name distant nebula Ua ʻŌhiʻa Lan. The ...

NASA's next big eye on the cosmos is now fully assembled. On Nov. 25, technicians joined the inner and outer portions of the ...

Dan Falk: Space junk broadly refers to stuff that’s in space that was put there by humans, and that is no longer doing what ...