Spirals in Nature

Challenge #60 in the Life in the Natural World series. Hosted by RuthC.
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Show us the unique and interesting ways nature uses spirals, whether in plants, flowers, seeds pods, in insects ands spiders, (the ultimate spiral makers), or shells etc. Subjects should be taken outside in their natural environment, if possible, not inside under artificial conditions. No flat circles, or spheres. Macro and close-up shots welcome. SIZE: 1,600px MAXIMUM ON LONGER SIDE.
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Heavenly Spiral
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The galaxies M82 (left) and M81 (right) are quite contrasting neighbors: M82 is an active starburst galaxy whereas M81 a relative quiescent grand design spiral.
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Submitted: Saturday, 17th August, 2013 07:27 (GMT)
Taken: Monday, 5th August, 2013
Focal length: 912 mm
Shutter speed: 2700 sec
Aperture: F7
ISO: 3200
Notes: 15x180 seconds, UHC filter, 5DII is Halpha modified
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