Planet news, features and articles

The recent discovery of a potential gas giant circling the nearby star Alpha Centauri A has led to speculation that it may be orbited in turn by a habitable moon that could support life, just like in the "Avatar" movies.

Six of Earth's neighboring planets — Mercury, Venus, Jupiter, Saturn, Uranus, and Neptune — will briefly appear in the sky on the same night, starting Sunday (Aug. 17).

Venus and Jupiter will meet in a conjunction in the early morning hours of Tuesday, Aug. 12. Here's everything you need to know to spot the two brightest planets at their best.

NASA's Curiosity rover has snapped black and white images of a rock on the Martian surface that looks remarkably like a piece of coral.

High-speed winds on exoplanet WASP-17b may align quartz crystals in its atmosphere and create dazzling light effects like "sun dogs."

Giant, ridge-like structures of methane ice, known as "bladed terrain," may be much more abundant along Pluto's equator than previously realized, a new study suggests.

New simulations suggest that up to four of the solar system's rocky planets, including Earth and a long-lost world, once orbited in mathematical harmony around the infant sun.

The debate about an undiscovered Planet X or Planet Nine has been going on for more than 100 years.

A super-Earth exoplanet has been detected within the habitable zone of a nearby red dwarf star, where liquid water might exist on its surface under the right atmospheric conditions.

A conjunction between a crescent moon and Mars joins an ongoing display of 'shooting stars,' making July 28 one of the best nights for skywatching all summer.