This phenomenon has been observed on other icy satellites , such as jupiter 's ganymede .

这个现象在许多覆盖着冰层的卫星上都得到了证实，例如木星的卫星之一ganymede。

Nasa 's hubble space telescope caught jupiter 's moon , ganymede , seemingly playing a game of peek-a-boo in this image from april 2007 .

2007年4月，nasa的哈勃空间望远镜捕捉到木星的月亮ganymede的踪迹，看起来像是正在玩躲猫猫的游戏。

Hubble 's view is so sharp that astronomers can see features on ganymede 's surface , most notably the white impact crater , tros , and its system of rays , bright streaks of material blasted from the crater .

哈勃敏锐地捕捉到ganymede表面的细节，最显眼的就是白色的弹坑tros，和它射线一样的表面纹路那是从弹坑里崩发出来的物质。

Ganymede completes an orbit around jupiter every seven days .

ganymede环绕木星运行一圈的周期是7天。

Specifically , dr kipping reckons , they would need to have at least a fifth of the mass of earth . Ganymede , jupiter 's most massive satellite ( and also the biggest in the local solar system ) , has only a fortieth of the earth 's mass .

准确的说，据drkipping估算，他们至少有地球质量的五分之一，而太阳系中最大的卫星木卫三（ganymede）质量仅仅是地球的四十分之一。