NGC 7331, the sight of supernova SN2025rbs, imaged by George Gheirchi (US).

Comet 3I/ATLAS has arrived as the third confirmed visitor from interstellar space, and it is not behaving the way a quiet chunk of ice and rock is supposed to. As astronomers track its path through ...

Interstellar comet 3I/ATLAS has turned into one of the strangest visitors in the recent history of the solar system, surrounding itself with a vast halo and suddenly lighting up in X-rays in a way ...

Highlights from a cometary trio that captured our imaginations. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. 2025 has seen stargazers look on ...