When a hunk of ice from another star system hurtles through our cosmic neighborhood, astronomers pay attention. When that same hunk of ice starts blasting out enough water to fill 70 Olympic swimming ...

I/ATLAS interstellar comet, first photographed from Mars orbit in October 2025, carries water ice with deuterium levels more ...

Add Yahoo as a preferred source to see more of our stories on Google. A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro ...

Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we still don't know where this interstellar object called 3I/ATLAS came from, ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be older than our Solar System, according to a new study. The comet, first ...

When Comet 3I/ATLAS entered our solar system last year—only the third known interstellar object to do so—astronomers took notice. And so did scientists involved in the search for extraterrestrial ...

The group leading the charge in the search for extraterrestrial life has given the all clear: An interstellar comet looks to be completely natural and free of any alien tech. The SETI Institute said ...

The group leading the charge in the search for extraterrestrial life has given the all clear: An interstellar comet looks to be completely natural and free of any alien tech. The SETI Institute said ...