When comet 3I/ATLAS swept through the inner solar system in late 2025, it gave astronomers something no interstellar visitor ...

A comet born around another star is carrying water unlike anything ever measured in our solar system. Interstellar comet ...

Looking for a sky event this week? Check out our full Sky This Week column. May 9: Look the croc in the eye Although still ...

In September 2012, Russian astronomers Vitali Nevski and Artyom Novichonok discovered Comet C/2012 S1; as they were using a ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

Discovered in 2017 by Pan-STARRS atop Halealakalā on Maui, ʻOumuamua was the first confirmed interstellar visitor. Its ...

ALMA reveals unusual “alien” water in interstellar comet 3I/ATLAS, showing it formed in an extremely cold, distant star ...

The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...

NASA advises looking toward the eastern sky before sunrise, particularly in mid to late April, when the comet will pass ...

"How many presumably disrupted comets have really completely disrupted, and could any of them have actually survived with a reduced, inactive nucleus?" When you purchase through links on our site, we ...

It's true, though: outer space does have a smell, or rather, many smells. The cosmos isn't sterile or empty, after all. It's ...