Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke6101.&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 6101. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astrophysics
Galaxies, Individual Galaxies
Scientific paper
M101 is a grand spiral galaxy in Ursa Major, located 5.5 degrees north of Eta Ursae Majoris, the star at the end of the handle of the Plough (or Big Dipper). It was discovered in March 1781 by Mechain and added by Messier to his list at the last minute without having checked it. M101 is classified as of type Sc, meaning that its arms are loosely wound, and they show beautifully on long-exposure p...
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