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Hubble captures stunning image of a comet's brush past Mars
Hubble captures stunning image of a comet's brush past Mars

Anybody need some new space wallpaper? NASA has just released this image of comet Siding Spring's close brush past Mars, and it is thrilling. The image you see above -- a fuzzy white comet hovering above a glowing rust-colored planet -- is actually a composite of several images taken by the Hubble Space Telescope on Saturday and Sunday.  There are a few reasons that Hubble could not take a picture like this in a single shot. For one, Mars is 10,000 times brighter than its cometary visitor, making it impossible to see details of Siding Spring and Mars in one exposure. Also, the two objects were racing past each other during their near-rendezvous on Sunday. At least one of...

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