Scientists may add a new dwarf planet to the official roster of our solar system. The distant, icy body, provisionally dubbed ...

ED138, a newly discovered dwarf planet candidate, could join a group of only five other recognized objects that includes our ...

NSF–DOE Vera C. Rubin Observatory has found a large object that scientists have identified as a possible dwarf planet. A ...

Astronomers have identified 2026 ED138, a large trans-Neptunian object beyond Pluto. Follow-up infrared observations will ...

As far-fetched as it may seem, quirks of orbital mechanics could allow hundreds of planets to be packed around a star ...

Add Yahoo as a preferred source to see more of our stories on Google. Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

A new study suggests that our solar system’s smallest planet has shrunk by up to 30 percent since its birth roughly 4.5 billion years ago ...

For the first time, astronomers have detected radio signals from a planet beyond our solar system, according to a study available on the preprint server arXiv. The landmark observation offers a new ...

Planet 9 would fall somewhere in between these categories. It could be what is known as a Super-Earth, a rocky planet larger than our own, or a sub-Neptune, a gaseous world less massive and slightly ...