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Image description: This photo of star trails was taken by Expedition 31 Flight Engineer Don Pettit on the International Space Station.
Pettit used the following photographic techniques to create the images: “My star trail images are made by taking a time exposure of about 10 to 15 minutes. However, with modern digital cameras, 30 seconds is about the longest exposure possible, due to electronic detector noise effectively snowing out the image. To achieve the longer exposures I do what many amateur astronomers do. I take multiple 30-second exposures, then ‘stack’ them using imaging software, thus producing the longer exposure.”
See more star trail images.
Photo from NASA JSC Photos.

Image description: This photo of star trails was taken by Expedition 31 Flight Engineer Don Pettit on the International Space Station.

Pettit used the following photographic techniques to create the images: “My star trail images are made by taking a time exposure of about 10 to 15 minutes. However, with modern digital cameras, 30 seconds is about the longest exposure possible, due to electronic detector noise effectively snowing out the image. To achieve the longer exposures I do what many amateur astronomers do. I take multiple 30-second exposures, then ‘stack’ them using imaging software, thus producing the longer exposure.”

See more star trail images.

Photo from NASA JSC Photos.

The International Space Station is the third brightest object in the sky. Find out when you can see it. 

Did you know that you can see the International Space Station from your house? The space station is easy to find in the sky if you know where and when to look for it.

Sign up for NASA’s Spot the Station service to receive an e-mail or text message a few hours before the space station passes over your house.

Today at 4:05 p.m., the Space Station will fly over Hurricane Irene. Watch live views on NASA TV.