In the early hours of 19 December 2025, while most of the world was asleep, a silent and ancient traveller made its closest pass to our home planet. Comet 3I/ATLAS, a high-speed visitor from the ...

Interstellar comet 3I/ATLAS's first reported sighting was on July 1, and it's going to be the closest it's ever been to Earth on Friday. Along the way, it reached several milestones leading up to what ...

Add Yahoo as a preferred source to see more of our stories on Google. The XMM-Newton observatory spotted a red X-ray glow around the interstellar comet on December 3. - ESA/XMM-Newton/C. Lisse; S.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory and ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...