Planetary Systems includes topics such as Extrasolar and Solar planets and Planetology. A planetary system consists of the various non-stellar objects orbiting a star such as planets, moons, asteroids, meteoroids, comets, and cosmic dust. The Sun and its planetary system, which includes Earth, is known as the Solar System. Planetary systems are generally believed to form as part of the same process which results in star formation. Accepted theories today argue that a protoplanetary disk forms by gravitational collapse of a molecular cloud and then evolves into a planetary system by collisions and gravitational capture.
NASA-JPL (May 13, 2009) – NASA's Kepler spacecraft has begun its search for other Earth-like worlds. The mission, which launched from Cape Canaveral, Fla., on March 6, will...
A Little Telescope Goes a Long WayLast Updated on 2010-02-09 at 17:35PASADENA, CA (Feb. 9, 2010) – NASA astronomers have successfully demonstrated that a David of a telescope can tackle Goliath-size questions in the quest to study Earth-like... More »
Avatar's Moon Pandora Could Be RealLast Updated on 2009-12-18 at 12:33CAMBRIDGE, MA (Dec. 18, 2009) – In the new blockbuster Avatar, humans visit the habitable - and inhabited - alien moon called Pandora. Life-bearing moons like Pandora or the... More »
Exoplanet: AtmosphereLast Updated on 2009-11-09 at 18:05An "exoplanet" is an extra-solar planet, that is, a planet orbiting a star other than our own sun. Of the roughly 307 currently known extrasolar planets, about thirty of... More »