IMAGE 1700_99\763.Lbm,On the way to Venus and Mercury, Mariner 10 snaps the Moon from about 110,000 km. The dark region in the centre is Humboldt's Sea.
IMAGE 1700_99\764.Lbm,A mosaic of Moon images taken by Mariner 10, showing prominently near the top, the circular Sea of Crises.
IMAGE 1700_99\765.Lbm,Mariner 10 at Mercury, March 29, 1974: a relatively smooth area of the surface; note the centre crater and its rays.
IMAGE 1700_99\766.Lbm,Mariner 10 at Mercury, March 29, 1974: the northern limb, showing on the horizon a prominent scarp (cliff).
IMAGE 1700_99\767.Lbm,Mariner 10 at Mercury, March 29, 1974: the large flat-floored crater is about 80 km across; the nearby valley some 6 km wide.
IMAGE 1700_99\768.Lbm,Mariner 10 at Mercury, March 29, 1974: the sharp edges of the small, 12-km across, crater near the centre shows that it is young.
IMAGE 1700_99\769.Lbm,Mariner 10 at Mercury, September 21, 1974: on its second encounter of Mercury, Mariner spies scarps more than 300 km long.
xxIMAGE 1700_99\769a.Lbm,Mariner 10 at Mercury: The concentric ridges and mountain range mark the edges of the most prominent feature on Mercury, the Caloris Basin.
IMAGE 1700_99\770.Lbm,Mariner 10 at Mercury: A mosaic of images making up a crescent Mercury. The inset shows a bright new crater, named Kuiper after the noted US astronomer Gerard Kuiper.
