oceans

天文·每日一图

地球上的所有水资源

An illustration of planet Earth is shown where the Earth is tan and has no water shown on its surface. In the foreground are several small blue spheres showing how much water is known to reside on our planet. Please see the explanation for more detailed information.
这张地球插图呈现的是棕褐色,表面没有水。前景中有几个蓝色小球,显示了地球上已知的水含量。有关更多详细信息,请参阅说明。

天文·每日一图

土卫二表面的鲜明虎纹

A light-colored spherical body is shown mostly illuminated against a dark background. Many craters are visible. Unusual blue stripes meander on the surface. Please see the explanation for more detailed information.
图中可见一颗浅色球形天体,在深色背景下大部分被照亮。可以看到许多陨石坑。表面蜿蜒着不寻常的蓝色条纹。有关更多详细信息,请参阅说明。

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