Lecture 3 - sites-Timeline of lunar history is built-up...

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10/04 Apollo- Moon History Lunar Science - Even “young surfaces” are old - Not all Mare surfaces formed at the same time - Impacts played a large role in shaping the Moon o Highlands not formed by volcanism, but by impacts - Imbrium Basin is 3.85 Byr old - What happens on Moon, happens to all worlds in the inner solar system o The moon is ancient and still preserves an early history that must be common to all inner solar system world Reasons to Go to Moon: - Part of Arms Race - To Surpass the Russians during Cold War - Scientific research was a side benefit Where To Land, and Why: - Near Side of Moon o No communication on far side - Near Lunar Equator o Less energy spent - Near Center o More communication before orbiting around moon on way back - Flat, smooth mare surfaces, Early Missions o Safe - Geologically diverse sites , Later Missions o Sampling of diverse array of rocks How Do You Get History of Moon from 840 lbs of rock, collected at six landing
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Unformatted text preview: sites?-Timeline of lunar history is built-up from the Apollo samples-Crater density plot is calibrated from the Apollo samples o Able to apply plot to all planets 5 Stages of Planetary Evolution I. Origin- Planetesimals collide to form a world in space II. Differentiation- Heating from the radioactive decay of elements cause heavier elements to sink to the center, and lighter elements to rise to the surfaces of a world III. Late Heavy Bombardment- World is exposed to heavy bombardment from other bodies in space. The scale of these bombardments declines through time. IV. Geological Activity- As a result of differentiation, geologic activity occurs on the world. Plate tectonics and volcanism shape the world and its surface. V. The Big Chill- Geological activity stops as radioactive elements run out. It no longer shapes the world and its surface....
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Lecture 3 - sites-Timeline of lunar history is built-up...

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