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NGC 2477
NGC 2477 is an open cluster in the constellation Puppis. It contains about 300 stars,〔(【引用サイトリンク】 work = SEDS Messier Objects Database )〕 and was discovered by Abbé Lacaille in 1751.〔 The cluster's age has been estimated at about 700 million years.〔 == Visual appearance == NGC 2477 is a stunning cluster, almost as extensive in the sky as the full moon. It has been called "one of the top open clusters in the sky",〔(【引用サイトリンク】 work = Results for NGC 2477 )〕 like a highly resolved globular cluster without the dense center characteristic of globular clusters. Burnham notes that several observers have remarked on its richness, and that although it is smaller than M46 (also an open cluster in Puppis), it is richer and more compact.
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 2477」の詳細全文を読む
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