Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

NEW YORK (AP) — A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Trump budget would slash NASA funds How to catch the Eta Aquarid ...

During the birth of the solar system, the planets are thought to have formed and grown through a process known as core accretion, building themselves up by sweeping up rocky debris and adding mass ...