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Messier 5: Difference between revisions
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[[File:375px-Messier 5 Hubble WikiSky.jpg|thumb|Messier 5]] | |||
Messier 5 or M5 (also designated NGC 5904) is a globular cluster in the constellation [[Serpens]]. It was discovered by Gottfried Kirch in 1702. It should not be confused with the much fainter and more distant globular cluster Palomar 5, which is situated nearby in the sky. | Messier 5 or M5 (also designated NGC 5904) is a globular cluster in the constellation [[Serpens]]. It was discovered by Gottfried Kirch in 1702. It should not be confused with the much fainter and more distant globular cluster Palomar 5, which is situated nearby in the sky. | ||
M5 is, under extremely good conditions, just visible to the naked eye as a faint "star" near the star 5 Serpentis. Binoculars or small telescopes will identify the object as non-stellar while larger telescopes will show some individual stars, of which the brightest are of apparent magnitude 12.2. | M5 is, under extremely good conditions, just visible to the naked eye as a faint "star" near the star 5 Serpentis. Binoculars or small telescopes will identify the object as non-stellar while larger telescopes will show some individual stars, of which the brightest are of apparent magnitude 12.2. | ||
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Spanning 165 light-years in diameter, M5 is one of the larger globular clusters known. The gravitational sphere of influence of M5, (i.e. the volume of space in which stars are gravitationally bound to it rather than being torn away by the Milky Way's gravitational pull) has a radius of some 200 light-years. | Spanning 165 light-years in diameter, M5 is one of the larger globular clusters known. The gravitational sphere of influence of M5, (i.e. the volume of space in which stars are gravitationally bound to it rather than being torn away by the Milky Way's gravitational pull) has a radius of some 200 light-years. | ||
At 13 billion years old, M5 is also one of the older globulars associated with the Milky Way Galaxy. Its distance is about 24,500 light-years from Earth and the cluster contains more than 100,000 stars, as many as 500,000 according to some estimates. | At 13 billion years old, M5 is also one of the older globulars associated with the Milky Way Galaxy. Its distance is about 24,500 light-years from Earth and the cluster contains more than 100,000 stars, as many as 500,000 according to some estimates.<ref>[http://en.wikipedia.org/wiki/Messier_5 Messier 5]</ref> | ||
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==HGS Session References== | ==HGS Session References== | ||
HGS Sessions - Clearing [[]] - 3/31/2015 <ref>HGS Session</ref> | HGS Sessions - Clearing [[Sexual Misery, Breeder Programs]] - 3/31/2015 <ref>HGS Session</ref> | ||
==References== | ==References== | ||