smd-planetary by NASA
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A list of NASA Planetary Science mission accounts (http://science.nasa.gov/planetary-science/)
I am a NASA lunar mission, currently in orbit ~50 km (30 mi) above the Moon!
Cruising around Saturn, its moons and the magnificent rings
Roaming the Red Planet on six wheels since Jan 2004. The official mission Twitter of the Spirit and Opportunity rovers.
NASA's latest mission to Mars. I arrived at the Red Planet, Aug. 5, 2012 PDT (Aug. 6 UTC).
MAVEN, set to launch in Nov. 2013, will explore Mars' upper atmosphere, ionosphere & interactions with the sun & solar wind. http://t.co/4aqGtqkk
JPL's Near Earth Object Office coordinates NASA's efforts to detect, track & characterize potentially hazardous asteroids & comets that could approach Earth.
The first true spaceship with two ports of call, the most massive objects in the asteroid belt: Vesta and Ceres. Tweets from Dawn's outreach & media team
: Information and updates for NASA's Eyes on the Earth and Eyes on the Solar System in-browser 3D exploration tools.
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