Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

Researchers say they found a curious dot on infrared images taken 23 years apart that seems to be moving in a manner consistent with a large, distant planet.

From solar probes to deep space missions, these record-breaking human-made objects reached speeds that make bullets and jets look slow by comparison.

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

This, together with the star's relatively young age of 18.5 million years, makes the disk a young Kuiper belt analog and therefore an excellent place to search for water ice.

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

Project Kuiper launched two prototype satellites in October 2023 and, within 30 days of launch, reportedly achieved a 100% success rate. The satellites were later intentionally removed from orbit in ...