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

The monsterous 85-mile-wide comet C/2014 UN271 isn't just the largest icy rock in the Oort Cloud, it's the second most ...

NASA said the Comet 12P/Pons-Brooks is racing toward its closest approach to the sun on its 71-year-long orbit. The orbit takes it as far away as the orbit of Neptune and as close as the orbit of ...

A team of astronomers has made a groundbreaking discovery by detecting molecular activity in comet C/2014 UN271 ...

The bright K2 comet — previously the farthest active comet ever spotted — approaches the Earth on July 13 and 14. ... “Neptune is 30 times the Earth-sun distance,” Jewitt said.

Want to see the “green comet” tonight? It’s been in the news for all of 2023, but few people have been able to get eyes-on with the elusive C/2022 E3 (ZTF). However, you still have a chance ...

The comet 67P/Churyumov-Gerasimenko has cliffs, boulders, ... the Irish astronomer Kenneth Edgeworth had suggested a population of such objects could exist beyond Neptune nearly 50 years earlier.

It really rocked their world. Scientists using the James Webb Space Telescope have better observed an asteroid that strangely possesses hybrid characteristics of a comet as well.. The strange rock ...

Currently, the comet is further out than Neptune, a bit over three billion miles from the sun—so far that it’s out of sight for even our largest telescopes and has been since 2003.

Comet 29P captured in infrared by the Spitzer Space Telescope after an eruption on Dec. 8, 2003. Cryovolcanoes have also been observed on Saturn's moon Enceladus, Jupiter's moon Europa and Neptune ...

A large asteroid-comet hybrid that orbits between Neptune and Jupiter is an intriguing oddball as far as cosmic rocks go. Chiron, as the strange centaur is called, is what astronomers call a minor ...

The moon, the Milky Way, Saturn, Venus, Jupiter Mars, Neptune, Uranus and comet C/2024 G3 are all visible at once in breathtaking new photos from the European Southern Observatory.