ASTR 151 1st Edition Lecture 17 Outline of Last LectureI. Chapter 8 Section 3 Surface FeaturesII. Chapter 8 Section 5 Lunar Cratering/ Surface CompositionIII. Chapter 8 Section 6 Mercury is less cratered than the MoonIV. Chapter 8 Section 7 InteriorsV. Chapter 8 Section 8 How the Moon was formedVI. Chapter 8 Section 9 Evolution: History of the Moon and MercuryOutline of Current LectureVII. Chapter 9 Section 1 Orbital PropertiesVIII. Chapter 9 Section 2 Physical PropertiesIX. Chapter 9 Section 3 Long Distance Observations of VenusX. Chapter 9 Section 4 The Surface of VenusXI. Chapter 9 Section 5 Atmosphere of VenusCurrent LectureI. Chapter 9 Section 1 Orbital Propertiesa. Venusi. Brighter the most stars, considered as the morning star1. Apparent brightness of Venus varies due to phase changesii. Earliest observations were made in 1500BCE by Babyloniansiii. Was named after the goddess of love lust and sexiv. Greeks thought Venus was two stars1. Lucifer morning star2. Vesper evening starII. Chapter 9 Section 2 Physical Propertiesa. Venus i. Radius = 6000kmThese 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*10^24kgiii. Rotation period retrograde (spins backwards) = 243 daysiv. 1 Venus day and rotation on axis.0067 = 117 earth daysv. No magnetic fieldvi. Has a temperature of 700 kelvinvii. No material satellitesviii. 224.7 earth days = 1 orbit rotationix. .0067 almost a perfect circleIII. Chapter 9 Section 3 Long Distance Observations of Venusa. 4.8*10^20kg mass atmosphereb. High Massc. 730 Kelvin surface temperatureIV. Chapter 9 Section 4 The Surface of Venusa. Made in carbon dioxide, nitrogen, and etcb. Light from the sun is mostly reflected offc. Clouds are made of Sulfuric acid/ hazei. Cloud bank is 50 – 70km above surface V. Chapter 9 Section 5 Atmosphere of Venusa. Permanent vortices at polesb. Runaway Greenhouse Effectc. Hadley Cellsi. Earth has a lot, Venus has only twoii. Clouds cover circles planet in four earth
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