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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Tombaugh Regio ： ウィキペディア英語版 Tombaugh Regio Tombaugh Regio ,〔Also , 〕 nicknamed The Heart after its shape,〔(New data reveals that Pluto's heart is broken ). ''Washington Post''. 14 July 2015. Retrieved 15 July 2015.〕〔(Coming today: a close-up of Pluto's heart ). ''New York Times''. 15 July 2015. Retrieved 15 July 2015.〕〔(New Horizons spacecraft displays Pluto's big heart ). NASA.gov. 14 July 2015. Retrieved 15 July 2015.〕 is the largest bright surface feature of the dwarf planet Pluto. It is just north of the equator, to the northeast of Cthulhu Regio and to the northwest of Krun Macula, both dark features. Its western lobe is named Sputnik Planum. ==Description== Tombaugh Regio is a large, light-colored region about across. The two lobes of the feature are geologically distinct. The western lobe, Sputnik Planum, is smoother than the eastern, and they are of slightly different colors. Early speculation was that the western lobe may be a large impact crater filled with nitrogen snow. Bright spots within the region were initially speculated to be mountain peaks. Photos, released on 15 July 2015, revealed mountains made of water ice in the feature; they also revealed no craters in this same region, suggesting that the 'heart' is less than 100 million years old and thus that Pluto is probably geologically active. Subsequent data indicated that the center of Sputnik Planum is rich in nitrogen, carbon monoxide, and methane ices, and that features near the edges of the region show evidence of ice flow such as glaciers, and light material overlying the darker material at the eastern edge of Cthulhu Regio. The feature had been identified as a bright spot for six decades prior to the ''New Horizons'' flyby, although it was impossible to image it with enough resolution to determine its shape. Over these six decades the spot had been observed to be dimming. 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「Tombaugh Regio」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.