NASA's Mars Reconnaissance Orbiter passes over the Red Planet's south polar region in this artist's concept illustration.
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NASA's Mars Rover Curiosity
Credit: NASA / JPL-Caltech
During its 84th and 85th days (sols) on Mars in late 2012, NASA's huge Mars rover Curiosity snapped this newest mosaic self-portrait.
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Opportunity Rover Studies Martian Rock
NASA's Opportunity Mars rover used its front hazard-avoidance camera to take this picture showing the rover's arm extended toward a light-toned rock named Tisdale 2 on Aug. 23, 2011.
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Dawn Probe Leaves Protoplanet Vesta
NASA's Dawn spacecraft arrived at the giant asteroid Vesta in July 2011 and departed in September 2012 for the dwarf planet Ceres.
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Europe's Rosetta Comet Mission
An artist's illustration of Rosetta's Philae lander on the surface of Comet 67P/Churyumov-Gerasimenko. Rosetta is due to arrive at the comet in mid-2014.
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NASA's Juno Spacecraft
The Juno spacecraft passes in front of Jupiter in this artist's depiction. Juno is slated to arrive at the solar system's largest planet in 2016.
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NASA's Cassini Probe
This artist's concept shows a flyby of Saturn's moon Enceladus by NASA's Cassini spacecraft.
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New Horizons at Pluto (Artist's View)
Credit: Southwest Research Institute
This artist’s concept shows NASA's New Horizons spacecraft during its 2015 encounter with Pluto and its largest moon, Charon.
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Voyager 1 and 2 at Solar System's Edge
Artist's concept of Voyager 1 and Voyager 2 at the edge of the solar system.
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Michael was a science writer for the Idaho National Laboratory and has been an intern at Wired.com, The Salinas Californian newspaper, and the SLAC National Accelerator Laboratory. He has also worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Mike on Google+.