12. As it zipped past Saturn's moon Dione this past weekend, NASA's Cassini spacecraft got its best look yet at the northern pole of this small, cratered moon.
13. Saturn's famous rings are visible along with two of its moons, Rhea and Dione which appear as faint dots in the right and lower right part of the picture.
从图中我们可以看到有名的土星光环和右下方的两个暗点,即瑞亚和狄俄涅卫星。
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14. The double-moon effect is aided by the matching reflectivity of Dione (top), which is closer to the camera, and Rhea, which is farther away but slightly larger than Dione.
15. The double-moon effect is aided by the matching reflectivity of Dione (top), which is closer to the camera, and Rhea, which is farther away but slightly larger than Dione.