太阳系十大魅力图片:木卫一有张“比萨脸”(7)
木卫一长着“比萨脸”
7、木卫一长着“比萨脸”
受木星重力搅动影响,木卫一是一个“火山大锅炉”,喷射着大量的硅酸盐、硫磺和二氧化硫。这颗气态行星周围的不规则轨道形成强烈的潮汐作用力,使得火卫一这颗卫星表面形成100多米的表面起伏。火山活跃性持续影响着这颗小卫星,表面上熔化的物质泛滥,新的火山喷射口形成“麻子”。
如图所示,这张图片结合了1979年“航行者”号太空飞船和“伽利略”号宇宙飞船拍摄的图像,据悉,“伽利略”号在90年代末至21世纪初对木星系统进行了探测。对木星卫星的国际性重大探测计划仍在筹划阶段,但是美国宇航局将着眼于探索冰冷的木卫二和木卫三。
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