Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000eaa..booke6009.&link_type=abstract
"Encyclopedia of Astronomy and Astrophysics, Edited by Paul Murdin, article 6009. Bristol: Institute of Physics Publishing, 2001
Astronomy and Astrophysics
Astrophysics
Stars, Stellar Populations And Star Clusters
Scientific paper
M9 is a globular cluster in the constellation of Ophiuchus (3 degrees south and 2 degrees east from η Ophiuchi), only 5500 light years from the Galactic Center. It has a visual brightness of 7.3 mag which is partly because of its great distance from the Sun (26 000 light-years) but also because it lies at the edge of a dark nebula and is hence dimmed by dust to the north and west. The cluster is ...
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