Astronomy Picture of the Day——月球南極

Astronomy Picture of the Day——月球南極

Southern Moonscape Image Credit & Copyright: Tom Glenn


Explanation: The Moon's south pole is near the top of this detailed telescopic view. Looking across the rugged southern lunar highlands it was captured from southern California, planet Earth. At the Moon's third quarter phase the lunar terminator, the sunset shadow line, is approaching from the left. The scene's foreshortened perspective heightens the impression of a dense field of craters and makes the craters themselves appear more oval shaped close to the lunar limb. Below and left of center is sharp-walled crater Tycho, 85 kilometers in diameter. Young Tycho's central peak is still in sunlight, but casts a long shadow across the crater floor. The large prominent crater to the south (above) Tycho is Clavius. Nearly 231 kilometers in diameter its walls and floor are pocked with smaller, more recent, overlaying impact craters. Mountains visible along the lunar limb at the top can rise about 6 kilometers or so above the surrounding terrain.


月球南極


在這幅望遠鏡拍攝的照片中,位於頂部的是月球南極。這幅照片是在美國南加利福尼亞拍攝的,可以看出月面南部的崎嶇地貌。此時正當下弦月,圖像中還能看到分佈十分密集的撞擊坑。由於投影效應,靠近邊緣處的撞擊坑呈現為橢圓形。靠近照片中心左下方的是直徑85千米的第谷環形山,環壁十分陡峭。年輕的第谷中央峰沐浴在陽光下,但在環形山底投下了長長的陰影。第谷環形山以南,也就是上方是巨大而明顯的克拉維烏斯環形山,它的直徑達231千米。它的環壁和環形山底疊加上了很多更小、更新的撞擊坑。在最頂部的月面邊緣處的山峰比其周圍的地面高出約6千米。



分享到:


相關文章: