One of six astronauts currently on board the International Space Station, geophysicist Alexander Gerst spends much of his free time staring out the window as the world zooms by 205 miles below, camera in-hand. Since arriving at the ISS in June of this year Gerst has taken tons of photographs that document hurricanes, floods, dust storms, and oil fields.

One of his favorite things to shoot are the shadows cast by clouds, something that appears surprisingly dramatic from space. Dense cloud formations can create long shadows that stretch for thousands of miles across the Earth’s surface as they eventually disappear into a black horizon. You can see new photos from Gerst daily on Twitter. (via Stellar)

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