Scientific Photography

Challenge #12 in the Great Movements in Photography series. Hosted by Mark Scott Abeln.
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Photography is more than just an art form; rather it also has great importance in science, industry, and government. Submit a photograph that has scientific or technological importance: consider astrophotography, photomicrography, or other photos with scientific, industrial, or technological interest. Just because a photograph has scientific interest, that does not mean that it must not be a striking and memorable image in its own right.
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The Dumbbell Nebula (M27) in Ha OIII Narrowband
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Known by the popular name of the Dumbbell Nebula and Messier Object 27, the beautifully symmetric interstellar gas cloud is about 1,200 light-years away in the constellation Vulpecula. This color composite view was recorded through narrow band filters sensitive to emission from hydrogen atoms (shown in red) and oxygen atoms (shown in blue/green). This approximates the human perceived color of these emissions.
Submitted: Friday, 29th April, 2011 01:03 (GMT)
Taken: Saturday, 17th June, 2006
Focal length: 1250 mm
Shutter speed: 7200 sec
Aperture: F5
Notes: Red channel consists of 14*4 minute exposures through a Ha narrowband filter. The Green and Blue channel consists of 16*4 minute exposures through a narrowband OIII filter.
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