Wonderful Long Exposure Photographs Shot From Space by Don Pettit

Over the past two months NASA has been releasing a number of wonderful long exposure photographs taken by astronaut Don Pettit aboard the International Space Station. To achieve the longer exposures he do what many amateur astronomers do. He take multiple 30-second exposures, then ‘stack’ them using imaging software, thus producing the longer exposure.  Check out many more photos from the series here.


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