The Latest Breaking News from Oort Cloud

Is a massive planet lurking beyond Pluto? Tyche planet mystery: In 1999, scientists proposed a world four times Jupiter's mass; 25 years later, the debate continues

Is there a giant hidden planet beyond Pluto? Tyche planet mystery explained: In 1999, astronomers proposed Tyche. They suspected a giant world hiding deep in the Oort Cloud. It was four times bigger than Jupiter. Weird comet paths pointed right to it. Then in 2014, NASA’s WISE telescope scanned the…

The Economic Times · Jul 29

C/2025 V1 Borisov: Mystery Object Detected Between Earth and 3I/ATLAS

Harvard's Avi Loeb argues 3I/ATLAS is an alien probe judging humanity, while C/2025 V1 Borisov, a conventional Oort Cloud comet, highlights its extreme anomalies. See the data and debate.

International Business Times UK · Nov 8, 2025

Astronomers discover the largest comet from the outskirts of the solar system is exploding with jets of gas

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 distant that is chemically active.

Space · Jun 19, 2025

Green comet not seen for 50,000 years now visible in night skies over UK

The comet was spotted crashing out of the Oort cloud on the edge of the solar system last year, and is now heading towards the Sun

Wales Online · Jan 25, 2023

Look up! A bright green comet unseen since the Neanderthals blazes in the night sky this month

Comet C/2022 E3 hasn't been seen for 50,000 years, but now's your chance.

Inverse · Jan 5, 2023

The most massive comet ever found

Comet Bernardinelli-Bernstein's nucleus is about 80 miles in diameter — larger than Rhode Island

Salon · Apr 13, 2022

Astronomers finally figure out the size of the largest comet ever found — and it's twice as big as Rhode Island

Comet C/2014 UN271 is twice the size of Rhode Island and the same size as the Death Star, and will swoop by Saturn in 2031.

Inverse · Apr 13, 2022