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The Week in Pictures: July 20–26, 2013

In the past seven days, NASA released images of Earth taken from the orbits of Mercury and Saturn, IRIS captured its first views of the Sun, Spitzer observed gas emissions from Comet ISON, and much more.
RELATED TOPICS: COMET ISON | EARTH
NASA/JPL-Caltech/JHUAPL/UCF

Spitzer observes gas emission from Comet ISON

Images with Spitzer’s Infrared Array Camera indicate carbon dioxide is slowly and steadily “fizzing” away from the comet, along with dust. Learn more »
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