BABAK TAFRESHI / SCIENCE PHOTO LIBRARY BABAK TAFRESHI / SCIENCE PHOTO LIBRARY
Messier marathon. Amateur astronomers at a Messier marathon in Seh Qaleh, Iran. 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. For a labelled version of this image see C011/4795.
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