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browse projects: Apophis Mission Design Competition Carl Sagan Fund for the Future Catalog of Exoplanets FINDS Exo-Earths International Year of Astronomy 2009 LIFE Experiment: Phobos LightSail - The Future of Solar Sailing Messages from Earth Observing Earth Pioneer Anomaly Planetary Microphones SETI Optical Telescope SETI Radio Searches SETI@home Shoemaker NEO Grants Space Advocacy Space Information

browse space topics: 2001 Mars Odyssey Asteroids and Comets Cassini-Huygens Chandra X-Ray Observatory Chandrayaan-1 Chang'e 1 Compare the Planets Dawn Deep Impact Earth Extrasolar Planets Genesis Hayabusa (MUSES-C) Hubble Space Telescope Jupiter Kaguya (SELENE) Lunar Reconnaissance Orbiter (LRO) Mars Mars Exploration Rovers Mars Express Mars Global Surveyor Mars Reconnaissance Orbiter Mars Science Laboratory Mercury MESSENGER Moon Near Earth Objects Neptune New Horizons Past Missions Phoenix Planetary Analogs Planetary Exploration Timelines Pluto and Charon Private Missions Rosetta Saturn Search for Extraterrestrial Intelligence SMART-1 SOHO Space Imaging Spitzer Space Telescope Stardust Trans-Neptunian Objects Ulysses Uranus Venus Venus Express Voyager Weekly Planetary Radio Trivia Contest

MY ROAD LEADS TO MARS! CAMPAIGN 2009 Send a letter to the President...tell him your Road Leads to Mars!

Have an Impact on Space Policy

Through active grassroots campaigns, Planetary Society members influence political decisions and ensure future space exploration. We successfully fought for a mission to Pluto, we're fighting to save Voyager and Hubble, and urging space agencies to develop a mission to Europa. By making our collective voice heard in the world's governments and space agencies, we make exploration happen.

Current Initiatives

The Planetary Society: Nearly 30 years of Space Advocacy

MY ROAD LEADS TO MARS! CAMPAIGN 2009 - Send a letter to the U.S. President.

Support Space Exploration

Visit our Legislative Action Center for information on how to contact your elected officials.