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Swift is a tiny lunar impact crater that is located in the northwestern part of the Mare Crisium, in the northeast part of the Moon's near side. Within two crater diameters to the south is the larger crater Peirce. Swift was previously designated Peirce B before being named by the IAU. This formation is circular and bowl-shaped, with a small floor at the midpoint of the sloping interior walls. It is a symmetrical crater with little appearance of wear from minor impacts. This crater has been incorrectly named 'Graham' on some maps. ==References== * * * * * * * * * * * * 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「Swift (lunar crater)」の詳細全文を読む スポンサード リンク
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