Extravehicular crewmember 2 (EV2) Terry Virts is reflected in the helmet visor of EV1 Barry Wilmore during Extravehicular Activity 29 (EVA 29). Earth is in the background. Courtesy of NASA hide caption

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This false-color image of Enceladus shows so-called "tiger stripes" across the moon's icy surface. Researchers believe the stripes are caused by an ocean beneath the ice. NASA/JPL/Space Science Institute hide caption

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The Two-Way

NASA Spacecraft To Skim Past Saturn's Icy Moon

The Cassini probe will pass within just 30 miles of Saturn's moon Enceladus. The goal is to search for signs of habitability.

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For several years, a satellite orbiting Mars has seen streaks flowing from Martian mountains during warm periods on the surface. Scientists have now confirmed that water is involved. NASA/JPL/University of Arizona hide caption

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This view of Pluto is based on high-resolution images taken on by NASA's New Horizons spacecraft and shows a diverse and complex surface variety. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute hide caption

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The Occator crater on the dwarf planet Ceres holds bright spots that are unlike any other area on the planet's surface, NASA says. This image's resolution is around 450 feet per pixel. NASA/JPL-Caltech/UCLA/MPS/DLR/IDA hide caption

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A stellar nursery consisting of a group of thick clouds of dust, known as the Thackeray globules, silhouetted against the pale pink glowing gas of the nebula, as captured by the European Southern Observatory's Very Large Telescope. ESO hide caption

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