A look inside the Dark Energy Camera shows the 74 blue-tinged sensors that detect light. The camera will survey distant, faint galaxies to learn more about dark energy. Reidar Hahn/Fermilab hide caption

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SETI says that its Allen Telescope Array will be back online in September, thanks to funding secured from online donations. The array is seen here, adjacent to a cow pasture in Hat Creek, Calif. Ben Margot/AP hide caption

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While orbiting the moon, Apollo 8 astronauts were greeted by this view of the rising earth. Today, competitors in the Google Lunar X PRIZE are trying to build robots that could reach the moon by the end of 2015. NASA hide caption

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A portion of the west rim of Endeavour crater sweeps southward in this view from NASA's Mars Exploration Rover Opportunity. NASA adjusted the colors in this image. Fans of the film Capricorn One may want to see the original orange-tinted image. NASA hide caption

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The Juno spacecraft, seen above Jupiter in this artist's rendering. Juno's primary mission is to improve our understanding of Jupiter's formation and evolution. NASA/JPL-Caltech hide caption

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NASA/JPL/University of Arizona

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