We've posted beautiful photos of star trails on Neatorama before, but never like this. NASA astronaut Don Pettit took mulitple 30-second snapshots of the skies over planet Earth and stack them together using imaging software to create these images of star trails from the International Space Station:
Take a look at the rest at NASA's ISS Star Trails Flickr photo set: Link - via Fast Company
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The 3rd and 4th pictures are just plain trippy.
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Awesome.
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