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Lecture 2

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Department
Origins
Course
ORIGINS 2B03
Professor
Laura Parker
Semester
Fall

Description
Lecture 2Tuesday September 13 20111230 PMScales Planets Stars Galaxies UniverseAstronomical scales are HUGEIf earth basketball moontennis ballJupiter is the largest planetYou can fit 1 million Earth into 1 sunYou can fit 900 Jupiters into the sun500 moons can fit into the EarthPluto is 40x the distance from the Sun in comparison to the EarthThe distance between the closest star and the sun is 4 lightyears awayEarth is a complicated planet as it has land water and atmosphereThe atmosphere insulates the earthOur moon is the biggest moon a planet our size can holdThe the moon is geologically dead low activity has huge fluctuations in temperatureNASA mission takes pictures today of apollo landing sites apollo 17Everything on the moon stats the same even footprintsMars is called the red planetIt has ice caps which is frozen CObut there is water frozen on its surface geologically 2dead has an atmosphere but very thinInner planets or terrestrial planets meaning you can stand on it Mercury Venus Earth MarsPlanets in our solar systemInner PlanetsMercury Venus EarthMars are the 4 inner planets
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