Astronomers discovered that C/2014 UN271, a massive comet more than 10 times larger than any known comet, is emitting jets of ...

Comet Nishimura came into NASA's STEREO-A spacecraft's field of view. The solar wind was interacting with the tail of the ...

Scientists said a comet known as the Oort Cloud comet — or C/2023 A3 Tsuchinshan-ATLAS — will pass by Earth on Saturday for the first time in 80,000 years. According to NASA, the comet will ...

The comet C/2023 A3 ... NASA map of Comet Tsuchinshan-ATLAS (C/2023 A3)'s path. The comet will reach its closest point to Earth on October 12, but may still disintegrate beforehand.

The last time the comet passed by Earth was 50,000 years ago, according to NASA. The comet will be close to Mars roughly a week later, according to astronomy charts. Report a correction or typo.

NASA astronaut Don Pettit, an accomplished astrophotographer (and inventor of the zero-G coffee cup), shared scenic views of Comet A3 via X on Sept. 22. The images show the bright comet against a ...