The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be chemically active.

The Oort cloud has sent its biggest comet yet towards the inner solar system, and it is travelling at an insane speed, releasing jets of carbon monoxide.

In 2003, NASA-funded researchers spotted what was then the most distant object discovered in our Solar System. The dwarf planet, named Sedna after the Inuit goddess of the sea, was found over 12.9 ...

According to the team's measurements, the comet's nucleus is around a whopping 128 kilometers (80 miles) across, making it bigger than the state of Rhode Island, and far larger than its closest ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

Scientists want to study a distant world in the solar system that is classified as a dwarf planet. But some experts think it ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Recent observations have revealed carbon monoxide venting from the largest comet ever seen, providing clues about its origins ...

A star with mass comparable to our Sun passing within 10,000 astronomical units could significantly disrupt the Oort Cloud, which marks the outer boundary of our solar system beyond Pluto.

As C/2014 UN271 approaches the sun, scientists anticipate that more frozen gases will begin to vaporize, revealing even more about the comet 's primitive makeup and the early solar system.

On March 8, ALMA spotted a pair of jets blasting out of the comet's nucleus – its solid icy core. Spectrometry revealed that ...

Astronomers have discovered a rare instance of a interstellar comet speeding through the solar system. The 3I/ATLAS was first ...