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NGC 6401
NGC 6401 is a globular cluster in the constellation Ophiuchus. William Herschel discovered this star cluster in 1784 with his 47 cm telescope, but mistakenly believed it to be a bright nebula. Later his son, John Herschel, was to make the same error because the technology of the day was insufficient to allow the individual stars to be resolved visually. == External links ==
* (''NGC 6401'' SEDS.org (Revised NGC) ) * (''NGC 6401'' NASA Extragalactic Database ) * (''Enigmatic cluster targeted by Hubble'' )
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「NGC 6401」の詳細全文を読む
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