NASA astronaut Don Pettit recently uploaded a gallery of photos to the Johnson Space Center’s Flickr page. Pettit on how he captured these amazing 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, the ‘stack’ them using imaging software, thus producing the longer exposure.”
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–From Retina: “Retina is your destination for the best visuals from the pages of Smithsonian and around the web. Ryan Reed, the magazine’s multimedia producer, is your curator.”
Every March, the Smithsonian Institution Archives celebrates Women’s History Month with a digital gallery release of stupendous female scientists, science journalists and engineers. Unfortunately many of these photographs are unlabeled. These ladies need to be celebrated not just for their photos, but for their achievements and histories!
The images come from a cache of records from a news organization called Science Service. Founded in 1921, Science Service popularized and disseminated scientific information. (It is now called the Society for Science & the Public.) ”It was kind of at the forefront of putting information about these women out there,” says Peters.
But with so many of the photos lacking identification, the Smithsonian Institution Archives decided it would reach out to the public for help in identifying and researching the scientists. Each March, a handful of largely unidentified portraits are posted to the Archives’ Flickr site.
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