Saturn's moon Enceladus (土卫二), imaged at high phase, shows off its spectacular water ice plumes emanating (传出,显示) from its south polar region in this image captured by NASA's Cassini spacecraft. (Photo: NASA/JPL/Space Science Institute)
Saturn's moon Enceladus (土卫二), imaged at high phase, shows off its spectacular water ice plumes emanating (传出,显示) from its south polar region in this image captured by NASA's Cassini spacecraft. (Photo: NASA/JPL/Space Science Institute)