The Works of Galileo

Starry Messenger (1610)

Mountains on the Moon

Galileo demonstrated the existence of mountains on the Moon (Figure 1) . Some Aristotelian physicists taught that the shading of the Moon was internal, its surface as smooth as a marble.

Galileo inferred the existence of a lunar atmosphere from the fact that the mountains are not seen on the edge of the lunar disk.

Figure 1 Figure 1 - Return to Text

Galileo, 1610.

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Exhibit credit: Kerry Magruder, with the assistance of , Marilyn B. Ogilvie, Duane H. D. Roller.

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