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2709 Sagan is a small main belt asteroid, which was discovered by Edward L. G. Bowell in 1982. It is named after the late astronomer Carl Sagan. Sagan is an S-type asteroid, meaning that it is stony in composition. 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「2709 Sagan」の詳細全文を読む スポンサード リンク
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