Science ❯ Astronomy ❯ Astrophysics ❯ Interstellar Objects

Cometary Composition

SPHEREx Finds Interstellar 3I/ATLAS Has Become a Fully Active Comet After Perihelion

New SPHEREx observations link the surge to heating after months inside the solar system's ice line.

New Images Show Interstellar Comet 3I/ATLAS Glowing Green With an Elusive Tail After Sun Swing