Everyone's favorite comet is about to fly away from Earth and continue on its interstellar journey. 3I/ATLAS recently passed by Earth on Friday, Dec. 19, and gave astronomers a fleeting but invaluable ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Who hasn't looked into the sky and wondered if there's life out there, somewhere, looking back at ...

A rare interstellar comet reaches its closest point to the sun on Wednesday and Thursday — and it's exciting astronomers around the world. Comet 3I/ATLAS is just the third confirmed interstellar ...