Figure 25.7: This composite shows the relative sizes of the four inner planets. From left to
right, they are Mercury, Venus, Earth, and Mars. ( 35 )
Figure 25.8: Mariner 10 made three flybys of Mercury in 1974 and 1975. ( 32 )
marvins-underground-k-12
(Marvins-Underground-K-12)
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