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・ Ruppin Academic Center
・ Ruppin Switzerland
・ Ruppina
・ Ruppiner See
・ Ruppoldsried
・ Rupprecht Geiger
・ Rupprecht Gerngroß
・ Rupprecht of the Palatinate
・ Rupprecht von Keller
・ Rupprecht, Crown Prince of Bavaria
・ Ruppur Nuclear Power Plant
・ Ruppy
・ Rupram Chakrabarty
・ Ruprecht
・ Ruprecht (name)
Ruprecht 147
・ Ruprecht Machleidt
・ Ruprecht of the Palatinate (Archbishop of Cologne)
・ Ruprecht of the Palatinate (Bishop of Freising)
・ Ruprecht Polenz
・ Ruprecht von Eggenberg
・ Ruprechtia
・ Ruprechtia apetala
・ Ruprechtov
・ Ruprechtshofen
・ Ruprekha Banerjee
・ Rupriikki Media Museum
・ Rupsa
・ Rupsa River
・ Rupsa Upazila


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Ruprecht 147 : ウィキペディア英語版
Ruprecht 147
Ruprecht 147 or NGC 6774 is a dispersed star cluster in the Milky Way galaxy. It is about 1,000 light years away, which is close to Earth in comparison with other such clusters. In late summer, it can be seen with binoculars in the constellation of Sagittarius. The stars, bound by gravity, are about 2 billion years old. The cluster, discovered in 1830 by John Herschel, was long thought to be an asterism (a random collection of stars) and remained underappreciated until 2012, when it was identified as a potentially important reference gauge for astrophysics research, particularly the research of Sun-like stars.
==References==



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