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[[HANDWRITTEN NOTES IN TWO COLUMNS SEPARATED BY DASHED LINE DOWN CENTER OF PAGE]] [[LEFT COLUMN]] [[circled]] 2 [[/circled]] - Hasn't (change)'d in ~3By except when something hits it -> Crater [youngest rocks on moon > oldest on Earth] -> Studying moon -> Picture of early s.s. --- H20 -> ~10 yrs ago - hint: Craters on S. Pole, H20? -360 degrees [permanently shadow... no sun, very cold] ∴ ice -> comets may still be there --- - Lcross Lcross-> looking for evidence of it - Launch 6/18 (remember) - ~7:30 AM crash (on purpose!) into 60mi w crater, s. pole - Sequence: separate tonite Booster go in 1st 6000 mph Blast hole ~90 ft deep Plume (moon dust) ~ 5-6 mi high Lcross flies thru plume (instruments) Then (4min) lcross ↓ [[/LEFT COLUMN]] [[RIGHT COLUMN]] [[circle]] 1 [[/circle]] Ahead of sched under budget? - Lovell - Mercifully brief - Q/A Hesitated - Astros don't like to be assoc w/ things that crash -> exception --- - 400 yrs ago, Galileo 1st turned telescope -> heavens. -> Moon not smooth (mtns, craters) studying it ever since - By far closest body to us (250 kmi, couple days; Mars ~x1000 (1 mi vs. 1000) Not surprising -> only place visited -> - Apollo missions -> 40 yrs ago -> 12 people landed on moon, showed us "magnificent desolation" of gray, barren landscape - Moon = dead world not active, no atmos -> But enormous value as lab: study early s.s. History - S.S. formed about 4 1/2 B ya early Earth -> no moon -> Crash -> LiQ Blob -> orbit, cooled Early lava -> Maria; [[/RIGHT COLUMN]]