Solar System Astronomy
Solar System Astronomy ASTR 101
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This 2 page Class Notes was uploaded by Onie Bernhard on Monday October 5, 2015. The Class Notes belongs to ASTR 101 at Colgate University taught by Staff in Fall. Since its upload, it has received 13 views. For similar materials see /class/219596/astr-101-colgate-university in Astronomy at Colgate University.
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Date Created: 10/05/15
PLATE 7O TYCHO AT MIDMORNING In this plate the mountainwalled plains are dif cult to recognize except at the extreme south The sun is not high in this area and the craters appear the same as earlier in the moming The ray system of Tycho is not as easily observed as at noon time Nevertheless the rim craters on Tycho are well de ned and the detail of the oor is at its best The dark inner halo around Tycho is in evidence but the bright outer one is not yet visible The left side of the oor can be examined for the presence of many small craters Perhaps all features in the region of Tycho were somewhat modi ed when the crater was formed Nevertheless the mountainwalled plains are probably the oldest features on the moon In photographs taken under a lower sun Maginus is seen to have more rim craters than the other mountainwalled plains At this phase the plain is easily found because of the bright craterlet on its oor However one can barely trace the outline of the plain as it has almost no inner or outer wall To the south of Maginus Clavius is wellde ned and appears quite different from the view under low sun 69 It is undoubtedly far shallower than Tycho and for the main part it resembles a ring of craters of various sizes which surround a slight depression Almost all typical mountainvwalled plains indicate a similar formation The faint scarp which connects Clavius and Longomontanus is more conspicuous than in the previous plate ma Hm N u
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