Comet Nishimura came into NASA's STEREO-A spacecraft's field of view. The solar wind was interacting with the tail of the comet in the footage. Credit: NASA/STEREO/Karl Battams | edited by Space.com's ...

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

On June 30, 1908, a catastrophic explosion rocked the skies over Eastern Siberia, releasing an energy equivalent to 10–15 ...

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.

Comet A3 has already grown a million times brighter since its discovery in January 2023. Don Pettit/NASA. NASA describes comets as "cosmic snowballs," made up of frozen gases, rock and dust. These ...

Some of these comets even come within a few thousand miles of the sun, according to NASA. Comet C/2023 A3 Tsuchinshan–ATLAS, a similar comet, has also been making its historic orbit around Earth ...

NASA officials said the comet made its closest transit past the sun on Sept. 27 and is on track to come within approximately 44 million miles of Earth on Saturday.

A rare comet will be visible on the western horizon in the Philadelphia region between Oct. 14-24, according to NASA. The comet, called Tsuchinshan-ATLAS, only passes by Earth once every 80,000 years.

Your unusual chance to see a comet in the sky is here. C/2023 A3 Tsuchinshan-ATLAS was discovered by astronomers in 2023 — and will appear to the naked eye over the next couple weeks.