Messier 9 (M9) is a globular cluster located in the southern constellation Ophiuchus.
The cluster has the designation NGC 6333 in the new General Catalogue. It lies at a distance of 25,800 light years from Earth. With an apparent magnitude of 8.42, M9 is too faint to be seen with the naked eye. The cluster was discovered by Charles Messier, who added it to his catalogue on May 28, 1764.
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