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Mare Undarum

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There are five known lunar domes within the mare. The surrounding basin material is of the Nectarian epoch, with the mare basalt being of the Upper Imbrian epoch. The crater Dubyago can be seen on the southern edge of the mare. On the northeastern edge of the mare is the crater Condorcet P.

When Mädler observed this area in the 1830s, he noted variations in the curved dark streaks that form this mare, leading him to speculate that the changes were caused by vegetation.

Fictional References

Mare Undarum was the location of the second catapult in Robert A. Heinlein's novel The Moon Is a Harsh Mistress. The exact location of the catapult was kept secret and was "A matter of Lunar national security."

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