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NGC 6341 (Globular Cluster, M92)


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NGC 6341, M92
Globular Cluster (球状星団)
Gb IV


別名 (Other names)
GCL 59, Messier 92

明るさ (Brightness)
6.5等級

星座 (Constellation)
ヘルクレス座 (Her) (Hercules)

距離 (Distance)
25,000光年 (25,000 light-years)

NGC 6341 (M92) is a globular cluster located 25,000 light years from the Earth in the constellation Hercules.

NGC 6341 (Globular Cluster, M92) : Picture

NGC 6341 (Globular Cluster, M92)
NGC 6341 (Globular Cluster, M92)
(C) ESA/Hubble & NASA, Acknowledgement: Gilles Chapdelaine
This striking new NASA/ESA Hubble Space Telescope image shows a glittering bauble named Messier 92. Located in the northern constellation of Hercules, this globular cluster — a ball of stars that orbits a galactic core like a satellite — was first discovered by astronomer Johann Elert Bode in 1777.

Messier 92 is one of the brightest globular clusters in the Milky Way, and is visible to the naked eye under good observing conditions. It is very tightly packed with stars, containing some 330,000 stars in total. As is characteristic of globular clusters, the predominant elements within Messier 92 are hydrogen and helium, with only traces of others. It is actually what is known as an Oosterhoff type II (OoII) globular cluster, meaning that it belongs to a group of metal-poor clusters — to astronomers, metals are all elements heavier than hydrogen and helium.

By exploring the composition of globulars like Messier 92, astronomers can figure out how old these clusters are. As well as being bright, Messier 92 is also old, being one of the oldest star clusters in the Milky Way, with an age almost the same as the age of the Universe.

Messier 92
Messier 92
(C) NASA

M92, NGC6341
M92, NGC6341
(C) Hillary Mathis, REU program/NOAO/AURA/NSF
M92 is a globular cluster in the constellation Hercules, slightly further away and a little younger than its near neighbor M13. M92 is about 28,000 light-years away, over 100 light-years across, and approximately 15 billion years old. It's even visible to the naked eye under excellent sky conditions.

This approximately true-color picture was created from images taken in June 1996 using BVR colors, at the Burrell Schmidt telescope of Case Western Reserve University's Warner and Swasey Observatory located on Kitt Peak, near Tucson, Arizona, during the Research Experiences for Undergraduates (REU) program operated at the Kitt Peak National Observatory and supported by the National Science Foundation. Image size 28.8 arc minutes.

M92
M92
(C) Doug Matthews/Adam Block/NOAO/AURA/NSF

NGC 6341 Messier 92
NGC 6341 (Globular Cluster, M92)
(C) NASA/ESA/Hubble
Messier 92
(C) NASA
M92 M92
M92, NGC6341
(C) NOAO
M92
(C) NOAO
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NGC 6341 (Globular Cluster, M92) : Movie

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