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Star Trails in Space (NASA, International Space Station, 03/16/12)

This is a composite of a series of images photographed from a mounted camera on the Earth-orbiting International Space Station, from approximately 240 miles above Earth. Expedition 31 Flight Engineer Don Pettit relayed some information about photographic techniques used to achieve 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." A total of 18 images photographed by the astronaut-monitored stationary camera were combined to create this composite.

 

Image credit: NASA

 

Original image:

spaceflight.nasa.gov/gallery/images/station/crew-30/html/...

 

More about space station research:

www.nasa.gov/mission_pages/station/research/index.html

 

There's a Flickr group about Space Station Research. Please feel welcome to join! www.flickr.com/groups/stationscience/

 

View more than 400 photos like this in the "NASA Earth Images" Flickr photoset:

www.flickr.com/photos/28634332@N05/

 

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These official NASA photographs are being made available for publication by news organizations and/or for personal use printing by the subject(s) of the photographs. The photographs may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement by NASA. All Images used must be credited. For information on usage rights please visit: www.nasa.gov/audience/formedia/features/MP_Photo_Guidelin...

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Taken on May 11, 2012