Crater-Hopping: Observing the Moon on Day 10
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A large portion of the 93 named features that become visible today are located in Mare Imbrium and the far eastern side of Oceanus Procellarum, as shown in Figure 15.1. We continue studying the rugged southwestern highlands. As we move toward the west limb, we begin to see the optical effects of foreshortening. The selenographic colongitude on the tenth lunation day ranges from about 28° to 46°. We start this day’s crater hopping at the southwestern crater Scheiner.