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

A large icy world beyond Pluto could join the dwarf planet roster. Rubin observations and older images traced its orbit, but ...

The object, known for now as 2026 ED138, is one of the first discoveries by the new Vera C. Rubin Observatory in Chile.

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

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond Neptune altering object orbits. If you get the question in Trivial Pursuit ...

Add Yahoo as a preferred source to see more of our stories on Google. About 4.6 billion years ago, a celestial cloud collapsed, paving the way for our solar system to form. Then, a nebula with strong ...

Add Yahoo as a preferred source to see more of our stories on Google. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky ...

The Sun is an incandescent but benevolent dictator. For billions of years, it’s kept our star system well organized through the influence of its powerful gravity. All the planets revolve around it on ...

Astronomers have uncovered evidence of a bizarre, potentially historic discovery: the first moon ever detected beyond our ...

Hestia.Yes?I'm being blamed for it again.Hestia looked up from her documents.What did you do this time?I didn't do anything.