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Lecture 23

AST 309 Lecture 23: Tour of the Solar System

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Department
Astronomy
Course
AST 309
Professor
Finkelstein Keely
Semester
Spring

Description
Tour of the SolarSystem Monday, April 3, 2017 11:00 AM Sun • Mercury • Hasa lunar-like surface • No atmosphere -exosphere • MessengerSpacecraft is most recent to visit Mercury Venus • Surface is completely hidden beneath permanent cloud cover • Very thick atmosphere • Surface is covered with gently rolling hills and volcanoes. ○ Maat Mons- volcanoonVenus Mars • Enormousshieldvolcanoes • VallesMarinerisisasbig astheentireUnitedStatesofAmerica • Ice caps dominate thepoles duringdifferenttimes of theyear ○ Maat Mons- volcanoonVenus Mars • Enormousshieldvolcanoes • VallesMarinerisisasbig astheentireUnitedStatesofAmerica • Ice caps dominate thepoles duringdifferenttimes of theyear • OlympusMons - the largest volcano in the solar systemhasa baselarger thanthe state ofArizona • Surface features indicate that water onceflowed on Mars • Evidence for flowing liquidwater onMars today: ○ The dark, narrowstreaks may have beenformedby recent flowing salty/briny water.Hydrated saltshave beenfoundon theseslopes,andcan infer that the dark streaks maybethe source of thehydration Jupiter • Largest of the planets • GiantRed Spot ○ Caused byhighpressure stormsin the atmosphere - like a hurricane ○ Could fit3 earths in it ○ Hasbeen aroundforatleast400 years § Storms on Jupiternever have to pass over land likeon Earth, which mayexplainwhytheycanpersistforsolong § The spot app
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