BABAK TAFRESHI / SCIENCE PHOTO LIBRARY BABAK TAFRESHI / SCIENCE PHOTO LIBRARY
Messier marathon. Amateur astronomers at a Messier marathon in Seh Qaleh, Iran. The sky is overlaid with a map of constellations and Messier objects During a Messier marathon the astronomers attempt to view all 110 Messier objects, which were catalogued by the 18th century French astronomer Charles Messier, in one night. Photographed on 28th April 2011.
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