Over a thousand objects are now known to orbit the Sun beyond Neptune, and once again we can't imagine torturing school children by adding even a dozen of the biggest ones to the list of planets.

Earth-like exoplanets (planets orbiting stars other than our sun) with oceans, lakes and rivers are thought to be unlikely, but the work reveals that many stars will harbor geological conditions ...

Mars has two moons, Phobos and Deimos. Scientists still debate whether these came from asteroids that passed close into Mars' ...

January's sky brings a planet parade, Mars opposition, and the Quadrantid meteor shower. Enjoy Venus and Saturn's close ...

A planet parade is when several of our solar system's planets are visible in the night sky at the same time. There will be six planets visible this time around, including Venus, Mars ...

A "domino effect" may occur in star systems whereby newly formed planets close to a star help ... [+] shepherd dust and gas to create more planets farther out in the system. Astronomers using a ...

All the planets revolve around it on roughly the same plane, and they also move in the same direction. Even so, there are slight anomalies in the architecture of our stellar neighborhood that can ...

The best telescopes for seeing planets give you the clearest views of ... telescopes has the most versatile choices. See our quick list below if you want to dive right in, or scroll further ...