从土卫二号北半球的这个角度来看，大型坑洞以及坑洞地带是非常罕见的。
Craters and cratered terrains are rare in this view of the southern region of the moon's Saturn-facing hemisphere.
今年，卡西尼号的服役时间又被进一步延长至2017年，它将一直保持探索状态直至土星北半球的夏至开始。
This year, it was given another life extension until 2017 to keep exploring until Saturn’s northern hemisphere summer solstice.
该图片是信使号航天器拍摄并在六月公布的，显示了水星的南半球。
This photo taken by the Messenger spacecraft and released in June shows Mercury's southern hemisphere.
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