The angleof the sun, coming from the northwest or the left of the image, throws the gullies in the crater into sharp relief.
从西北边（即照片左边）直射过来的阳光将陨坑中的沟壑照得清清楚楚。
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Streaming through a gap in the eastern wall of 45 kilometer wide Hesiodus crater, the low-angle sunlight produces a long sunrise ray playing along the otherwise Shadowed crater floor.
During the October 6, 2008 flyby of Mercury, MESSENGER's NAC captured a new view of the bright, radial ejecta rays of Kuiper crater that were previously imaged by Mariner 10 at a lower Sun Angle.