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 ...

Comet NEOWISE will be visible above the northwestern horizon in the Northern Hemisphere in the evenings this month. Once it disappears from view, the comet will not be visible in Earth’s skies ...

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 ...

"This comet isn't expected to be quite the spectacle that Comet NEOWISE was back in 2020," NASA said. "But it's still an awesome opportunity to make a personal connection with an icy visitor from ...

The comet's approach toward Earth coincides with a total solar eclipse on April 8. Around that time, 12P/Pons-Brooks will be at or near perihelion, the point during orbit when it's closest to the sun.

K2 was the farthest active inbound comet ever seen when NASA's Hubble Space Telescope captured it. It was observed at 17 times the Earth-sun distance, Jewitt said.

NASA's Hubble Space Telescope has confirmed the largest icy comet nucleus ever seen by scientists. The nucleus of comet C/2014 UN271 (Bernardinelli-Bernstein) is about 80 miles in diameter, which ...

A speeding comet the size of a mountain will come within 87,000 miles of Mars on Oct. 19, and NASA is planning to observe it with just about everything the agency's got.

You can generally expect to see about 10 meteors per hour, according to NASA. Here’s how and where you can catch the Eta Aquarid meteor shower in Florida. Can I see the Eta Aqarids in Florida?

A NASA spacecraft may one day sling itself from one comet or asteroid to another using a harpoon and a superlong tether. That's the idea behind Comet Hitchhiker, a proposal that received funding ...

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 ...