An artist's depiction of the surface of the planet Proxima b as it orbits the red dwarf star Proxima Centauri, the closest star to our solar system. The planet is a bit more massive than Earth, scientists say, and circles its star once every 11 days. ESO/M. Kornmesser/Nature hide caption

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This Planet Just Outside Our Solar System Is 'Potentially Habitable'

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The Japanese Subaru Telescope on Mauna Kea in Hawaii has the right attributes for searching for Planet Nine. National Astronomical Observatory of Japan hide caption

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Astronomers Are On A Celestial Treasure Hunt. The Prize? Planet Nine

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This illustration show's NASA's Juno mission approaching Jupiter. Juno used distant stars to chart its course across the void. NASA/JPL-Caltech hide caption

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'Star Trackers' Help Juno Find Its Way

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Launched from Earth in 2011, the Juno space probe has nearly reached Jupiter. If all goes as hoped, the probe will repeatedly dive between the planet and intense belts of charged particle radiation, in an orbit that will take it from pole to pole. JPL/NASA hide caption

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Juno Space Probe Is Set To Enter Jupiter's Orbit On Monday

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The imagined view from Planet Nine back toward the sun. Astronomers think the huge, distant planet is likely gaseous, similar to Uranus and Neptune. Caltech/R. Hurt (IPAC) hide caption

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Scientists Find Hints Of A Giant, Hidden Planet In Our Solar System

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A portrait of Pluto (right) and its moon Charon in a colorized, composite image made July 11 during the final approach of the New Horizons spacecraft. Astronomers are eager to get a much closer view of the icy world Tuesday. NASA-JHUAPL-SWRI hide caption

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Planet Or Not, Icy Pluto To Finally Get Its Day In The Sun

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Stars over the Cerro Tololo Inter-American Observatory in Chile. Sheppard and Trujillo used the new Dark Energy Camera (DECam) on a telescope there to find the distant dwarf planet 2012 VP 113. Reidar Hahn/Fermilab hide caption

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Hunting For Big Planets Far Beyond Pluto May Soon Be Easier

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In this artist concept provided by NASA, the MAVEN spacecraft approaches Mars on a mission to study its upper atmosphere. AP hide caption

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Mission To Study Mars' Climate Enters Red Planet's Orbit

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An illustration of what the Philae lander will look like at work on Comet 67P/Churyumov-Gerasimenko. AOES Medialab/ESA hide caption

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Part of the ALMA array on the Chajnantor plateau of Chile points skyward to the Milky Way, our own galaxy. The center of our galaxy is visible as a yellowish bulge crossed by dark lanes, which are themselves huge clouds of interstellar dust. José Francisco Salgado/ESO hide caption

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Your direct connection with the stars and all of the space in between them. iStockphoto.com hide caption

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Even if we find other life out there, in the depths of space, life here will still be a rare gem that must be worshipped and preserved at all costs. ESO hide caption

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