File:International Space Station star trails - JSC2012E039801.jpg

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English: Star trail composite image created by International Space Station Expedition 30 crew member Don Pettit using images ISS030E1730711 through ISS030E173131.


Expedition 30 and Expedition 31 Flight Engineer Don Pettit provided 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."
Date Taken on 5 April 2012
Source NASA JSC Flickr account
Author NASA/Don Pettit
This image or video was catalogued by Johnson Space Center of the United States National Aeronautics and Space Administration (NASA) under Photo ID: JSC2012E039801.

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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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current15:37, 8 October 2012Thumbnail for version as of 15:37, 8 October 20124,256 × 2,832 (778 KB)Spideog (talk | contribs)User created page with UploadWizard

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