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Science Mission Directorate
NASA uses orbiting observers and robotic landers to investigate the planets, moons, comets, and asteroids of our Solar System.
More Features
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NASA Probe Counts Space Rock Impacts on Mars
05.15.13 - Scientists using images from NASA's Mars Reconnaissance Orbiter have estimated that the planet is bombarded by more than 200 small asteroids or bits of comets per year forming craters at least 12.8 feet (3.9 meters) across.
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Asteroid 1998 QE2 to Sail Past Earth
05.15.13 - Asteroid 1998 QE2 will get no closer than about 3.6 million miles at time of closest approach on May 31 at 1:59 p.m. Pacific (4:59 p.m. Eastern).
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Three X-class Solar Flares in 24 Hours
05.14.13 - The sun's third significant solar flare in under 24 hours -- and the strongest so far of 2013 -- peaked at 9:11 p.m. EDT on May 13, 2013.
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Impacts of Strong Solar Flares
05.13.13 - Some people worry that a gigantic "killer solar flare" could hurl enough energy to destroy Earth, but this is not actually possible.
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Hubble Tells a Tale of Galactic Collisions
05.10.13 - 2MASX is an ultraluminous infrared galaxy which emits a tremendous amount of light at infrared wavelengths. Scientists connect this to intense star formation.
News Releases
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NASA's Asteroid Sample Return Mission Moves into Development
05.16.13 - NASA's first mission to sample an asteroid is moving ahead into development and testing in preparation for its launch in 2016.
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NASA Hosts Kepler Spacecraft Status Teleconference Today
05.15.13 - NASA will host a news teleconference at 4 p.m. EDT, today, May 15, to discuss the status of the agency's Kepler Space Telescope.
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NASA Probe Counts Space Rock Impacts On Mars
05.15.13 - Scientists using images from NASA's Mars Reconnaissance Orbiter (MRO) have estimated that the planet is bombarded by more than 200 small asteroids or bits of comets per year forming craters at least 12.8 feet (3.9 meters) across.
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NASA'S Hubble Space Telescope Finds Dead Stars 'Polluted' With Planet Debris
05.09.13 - NASA's Hubble Space Telescope has found the building blocks for Earth-sized planets in an unlikely place-- the atmospheres of a pair of burned-out stars called white dwarfs.
Podcasts
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NASACast: Solar System
Audio and Video podcasts on NASA missions exploring our solar system.
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NASACast: What's Up?
NASA's monthly guide to watching the night sky.