日期:
来源:雅诚德英语网
Janus is one of Saturn's smaller moons and measures only about 180 kilometers across.
土卫十是土星小卫星之一,据测直径只有180千米左右。
Janus is one of Saturn's smaller moons and measures only about 180 kilometers across.
土卫十是土星小卫星之一,据测直径只有180千米左右。