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Jalkr is a bright crater on Jupiter's moon Callisto measuring 74 km across (in the lower part of the image). This an example of a central dome impact crater. A smaller degraded crater in the upper part of the image is called Audr. == 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「Jalkr (crater)」の詳細全文を読む スポンサード リンク
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