Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest observations will be made.

Comet Lemmon, discovered earlier this year, is gearing up for a close approach to Earth later this month. It may become ...

A comet from another star system is swinging by Mars as a fleet of spacecraft trains its sights on the interstellar visitor ...

Something strange is moving through our solar system — and scientists are scrambling to figure out exactly what it is.

A comet traveling outside the solar system and heading toward the Earth is much larger than scientists first believed, a ...

I f you’ve ever wanted to see a chunk of the early solar system with your own eyes, now’s your chance. The comet C/2025 A6, ...

I/ATLAS stands apart from other interstellar objects because of its size as well as pace, and will soon disappear from ...

Hale-Bopp became known as the "great comet" after the previous "great comet of 1811". That comet was visible to the naked eye for around 260 days, and was the record-holder until Hale-Bopp came into ...

A UCLA astronomer who leads planetary defense missions for NASA says avoiding asteroid impacts is “a problem we can ...

Travel back into the past to an era when giants roamed the Earth. Keep in mind that you’re in an eat-or-be-eaten world, so get well-prepared with Primeval Earth codes. You’ll be in trouble if your ...