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Astronaut Don Pettit is Serious, He Rigged up Astrophotography Gear on the ISS

Don Pettit is one of the astronauts currently on board the International Space Station. He's also a serious shutterbug and amateur astronomer. To take advantage of his current lofty perspective, he rigged up a special star tracking mount that he could use to take long-exposure astrophotos from the ISS. The homemade orbital sidereal tracker rotates at a 90-minute period to match the pitch rate of the ISS, allowing him to take 30-second exposures.

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