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Take a journey through space. Visit the planets, moons, asteroids, and comets that wander our planetary neighborhood and learn about the spacecraft that send us information and images about our solar system. Then, look beyond — explore newly-discovered planets orbiting other stars and search for life beyond Earth. Society Projects
Recent Additions
Weekly Planetary Radio Trivia Contest
Each Monday, Planetary Radio asks listeners a question. Listeners must send in their answers to planetaryradio@planetary.org by the following Monday. The winner will be chosen by a random drawing from among all the correct entries received. This week's prize is the complete 4th season of the... 
Dawn
Dawn Journals: Dawn Project System Engineer Marc Rayman is contributing updates on the status of Dawn to The Planetary Society Weblog! Jan 30, 2010: Thruster Two's time to shine Dec 30, 2009: Patiently accelerating Nov 27, 2009: In the asteroid belt, but far from asteroids Oct 31, 2009: Taking up... 
Mars Exploration Rovers
The twin Mars Exploration Rovers (MER) -- Spirit and Opportunity -- were designed to study the history of water on Mars at their landing sites and to uncover geologic clues about whether Mars had any environments wet enough in the past to have been hospitable to life. Spirit launched for the Red... Space TopicsLearn about space by exploring these and many more topics! Contests, Events, and AwardsExtrasolar PlanetsHow It WorksNear Earth ObjectsOur Solar SystemSearch for LifeSpace Missions
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