来自朱诺的木卫三
(原标题: Ganymede from Juno)
2023-11-28
浏览次数: 19
太阳系中最大的卫星长什么样？木星的卫星Ganymede比水星和冥王星还要大，它冰冷的表面上点缀着明亮的年轻陨石坑，上面覆盖着更古老、更暗、陨石坑更多、布满沟槽和山脊的地形。沟槽地形的成因仍然是一个研究课题，主要的假设是与移动的冰盖有关。木卫三被认为有一个海洋层，比地球含有更多的水，可能存在生命。和地球的卫星一样，木卫三也对着它的中心行星，也就是木星。这张特色图片是美国宇航局的朱诺号探测器在2021年经过这颗巨大的卫星时拍摄的。这次近距离通过将朱诺号环绕木星的轨道周期从53天缩短到43天。朱诺号继续研究这颗巨大行星的高重力、不寻常的磁场和复杂的云结构。关注YouTube上关于APOD影像的播客
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What does the largest moon in the Solar System look like? Jupiter's moon Ganymede, larger than even Mercury and Pluto, has an icy surface speckled with bright young craters overlying a mixture of older, darker, more cratered terrain laced with grooves and ridges. The cause of the grooved terrain remains a topic of research, with a leading hypothesis relating it to shifting ice plates. Ganymede is thought to have an ocean layer that contains more water than Earth -- and might contain life. Like Earth's Moon, Ganymede keeps the same face towards its central planet, in this case Jupiter. The featured image was captured in 2021 by NASA's robotic Juno spacecraft when it passed by the immense moon. The close pass reduced Juno's orbital period around Jupiter from 53 days to 43 days. Juno continues to study the giant planet's high gravity, unusual magnetic field, and complex cloud structures. Follow Podcasts about APOD's Images: on YouTube
© NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin M. Gill;