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Lecture 15

Lecture 15--17, Study Guide

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University of Toronto Scarborough
Rick Halpern

Lecture 15: Jupiter More than 2x mass of all planets in solar systems 11000 of sun mass Orbits at 5.2 AU with 11.86 tropical years 3 brightest object in sky Not rocky Rotation period calculated by observing rotation of magnetic field 9hr 55min Squashed by rotation but not as much as expected. o Calculations tell us that this must be because Jupiter has a dense (rocky-type) core. About 10 Earth masses!! o The Atmosphere of Jupiter Has bright zones had dark belts Zones are cooler and higher than belts Under zones and bands are stable flows called zonal flow The equator has highest wind speed Shear of different velocity bands rolls up clouds layers into rotating spots Composition of Atmosphere Mostly hydrogen and helium with trace methane, ammonia and water vapor Jupiter is mostly atmosphere Color from chemical interactions No solid surface so we take troposphere to be 0km High wind speed at depth due to planets interior heat o Great Red Spot Has existed for 300 years Spot bigger than earth o Ineternal Structure Jupiter radiates more energy than it receives from the sun Core still cooling off from heating during gravitational compression Jupiter has to be 80 bigger to be considered a faint star Center is rocky composition 10x size of the earth, middle is metallic hydrogen and hydrogen and, top is
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