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 ...

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

A new study, however, identifies a possible candidate. A separate team of astronomers compared 1983 data from the Infrared ...

This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our ...

Scientists think they’ve detected a new planet beyond Neptune. Find out why experts believe 'Planet X' might support alien ...

Astronomers have detected a promising sign of a ninth planet lurking at the the farthest reaches of the Solar System.

We thought gravity would slow things down so I could throw up *** ball ... A new "Tatooine-like" planet outside the solar system may orbit two failed stars, scientists reported Wednesday.Related ...