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NGC 189 is an open cluster in the Cassiopeia constellation. It was discovered by Caroline Herschel on 27 September 1783, and independently rediscovered by John Herschel on 27 October 1829. ==External links== * (NGC 189 @ SEDS NGC objects pages ) * (NGC 189 ) at NightSkyInfo.com * 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 189」の詳細全文を読む スポンサード リンク
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