Add Yahoo as a preferred source to see more of our stories on Google. It's possibly as big as Manhattan, likely older than our own solar system and it's traveling through space at speeds of up to ...

NASA hosted a livestream Nov. 19 to share newly released images of Comet 3I/ATLAS, the third known interstellar object to traverse our solar system. The unprecedented observation campaign utilized a ...

The planets will align in the night sky on Feb. 28. Here is when to look up and which ones are visible without a telescope.

Astrophysicists are scrambling to study an ancient comet from another star system that entered the solar system this year, and which has already swung past Mars. Dubbed 3I/ATLAS, the comet poses no ...

3I/ATLAS, an interstellar object identified by NASA as a comet, recently passed its closest point to the sun. Scientists around the world are observing its months-long journey to learn more about the ...

Interstellar comet 3I/ATLAS has spent the last several months on a tour of our solar system. NASA spacecraft and telescopes have snapped photos of this celestial visitor over the course of its journey ...

NASA’s Planetary Defense Coordination Office sounds like something out of a disaster movie, but its work is far more methodical than cinematic. Instead of scrambling at the last minute, the office ...

Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...