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NGC 6171 (Globular Cluster, M107)


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NGC 6171, M107
Globular Cluster (球状星団)
Gb X


別名 (Other names)
GCL 44, Messier 107

明るさ (Brightness)
7.8等級

星座 (Constellation)
へびつかい座 (Oph) (Ophiuchus)

距離 (Distance)
20,000光年 (20,000 light-years)

NGC 6171 (M107) is a globular cluster located 20,000 light years from the Earth in the constellation Ophiuchus.

NGC 6171 (Globular Cluster, M107) : Picture

Messier 107
Messier 107
(C) NASA/ESA
The Hubble Space Telescope captured a crowd of stars that looks rather like a stadium darkened before a show, lit only by the flashbulbs of the audience’s cameras. Yet the many stars of this object, known as Messier 107, are not a fleeting phenomenon, at least by human reckoning of time -- these ancient stars have gleamed for many billions of years.

Messier 107 is one of more than 150 globular star clusters found around the disc of the Milky Way galaxy. These spherical collections each contain hundreds of thousands of extremely old stars and are among the oldest objects in the Milky Way. The origin of globular clusters and their impact on galactic evolution remains somewhat unclear, so astronomers continue to study them.

Messier 107 can be found in the constellation of Ophiuchus and is located about 20,000 light-years from our solar system.

French astronomer Pierre Méchain first noted the object in 1782, and British astronomer William Herschel documented it independently a year later. A Canadian astronomer, Helen Sawyer Hogg, added Messier 107 to Charles Messier's famous astronomical catalogue in 1947.

Messier 107
The globular star cluster Messier 107
(C) ESO/ESO Imaging Survey
The globular cluster Messier 107, also known as NGC 6171, is located about 21 000 light-years away in the constellation of Ophiuchus. Messier 107 is about 13 arcminutes across, which corresponds to about 80 light-years at its distance. As is typical of globular clusters, a population of thousands of old stars in Messier 107 is densely concentrated into a volume that is only about twenty times the distance between our Sun and its nearest stellar neighbour, Alpha Centauri, across. This image was created from exposures taken through blue, green and near-infrared filters, using the Wide Field Imager (WFI) on the MPG/ESO 2.2-metre telescope at La Silla Observatory, Chile.

M107
M107
(C) Bruce Hugo and Leslie Gaul/Adam Block/NOAO/AURA/NSF
M107 is the last globular cluster in Messier's catalogue of 110 objects. Messier's catalogue originally included only 103 objects. Upon discovering notes from Messier suggesting that he did indeed know of several other deep sky nebulae, clusters and galaxies, astronomers added seven extra objects including the globular cluster M107. M107 lies about 21,000 lightyears away in the constellation Ophiuchus.

Messier 107
The globular star cluster Messier 107 in the constellation of Ophiuchus
(C) ESO, IAU and Sky & Telescope
This chart shows the location of the globular cluster Messier 107, also known as NGC 6171, within the constellation of Ophiuchus. This map shows most of the stars visible to the unaided eye under good conditions and NGC 6171 itself is highlighted with a red circle on the image. This rich cluster is visible in binoculars and is an impressive sight in moderate-sized amateur telescopes.

Messier 107 Messier 107
Messier 107
(C) NASA/ESA
Messier 107
(C) ESO
M107
M107
(C) NOAO
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NGC 6171 (Globular Cluster, M107) : Movie

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