ASTR 151 1st Edition Lecture 17 Outline of Last Lecture I Chapter 8 Section 3 Surface Features II Chapter 8 Section 5 Lunar Cratering Surface Composition III Chapter 8 Section 6 Mercury is less cratered than the Moon IV Chapter 8 Section 7 Interiors V VI Chapter 8 Section 8 How the Moon was formed Chapter 8 Section 9 Evolution History of the Moon and Mercury Outline of Current Lecture VII Chapter 9 Section 1 Orbital Properties VIII Chapter 9 Section 2 Physical Properties IX X Chapter 9 Section 3 Long Distance Observations of Venus Chapter 9 Section 4 The Surface of Venus XI Chapter 9 Section 5 Atmosphere of Venus Current Lecture I Chapter 9 Section 1 Orbital Properties a Venus i Brighter the most stars considered as the morning star 1 Apparent brightness of Venus varies due to phase changes ii Earliest observations were made in 1500BCE by Babylonians iii Was named after the goddess of love lust and sex iv Greeks thought Venus was two stars 1 Lucifer morning star 2 Vesper evening star II Chapter 9 Section 2 Physical Properties a Venus i Radius 6000km These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute ii Mass 4 9 10 24kg iii Rotation period retrograde spins backwards 243 days iv 1 Venus day and rotation on axis 0067 117 earth days v No magnetic field vi Has a temperature of 700 kelvin vii No material satellites viii 224 7 earth days 1 orbit rotation ix 0067 almost a perfect circle III Chapter 9 Section 3 Long Distance Observations of Venus a 4 8 10 20kg mass atmosphere b High Mass c 730 Kelvin surface temperature IV Chapter 9 Section 4 The Surface of Venus a Made in carbon dioxide nitrogen and etc b Light from the sun is mostly reflected off c Clouds are made of Sulfuric acid haze i Cloud bank is 50 70km above surface V Chapter 9 Section 5 Atmosphere of Venus a Permanent vortices at poles b Runaway Greenhouse Effect c Hadley Cells i Earth has a lot Venus has only two ii Clouds cover circles planet in four earth days
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