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Published byCora Parrish Modified over 9 years ago
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Venus A. Earth Sister Planet
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1. Same Size, Mass, Density 2. Unlike temperature and pressure conditions 3. 0.7 A.U from the Sun
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B. Atmosphere 1. Clouds contain sulfuric acid some water
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2. atmosphere 98% Carbon Dioxide
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3. Pressure 90 X Earth Pressure
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a) carbon dioxide is why pressure is so great b) on Earth combined with water to form limestone
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C. Rotation 1. 243 Earth Days to spin on axis one time 2. Retrograde ( backwards, Sun would rise in the West)
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D. Revolution 1. 225 Earth Days 2.1 solar day=127 Earth days A solar day is when the Sun returns to the same place in the sky. Weird effect for Mercury and Venus due to rate of rotation ( spin) being close to the rate of revolution ( travel around the Sun
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E. Temperature 1. 900 0 F 2. Should be 200 o F 3. Caused by the Greenhouse effect
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F. Surface 1. Study by Radar 2. Found Huge mountains 3. Found Large volcanoes
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Volcanoes?
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Volcanoes?
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Active? 700 miles across lightning Sulfur dioxide
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Iceland Volcano Eyjafjallajokull 4-20-10 had lightning Maybe Venus has active volcanoes http://abcnews.go.com/GMA/video /pronounce-eyjafjallajokull- 10392613
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4. Long Trough a) 900 miles long b) like East Africa rift valley on Earth
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G. Unmanned Spacecraft 1. USA Mariner and Pioneer
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a) only orbiters b) 5 c) observe clouds and atmosphere
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2. USSR Venera 1-16 a) orbiters b) landed 8 times
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c) destroyed by high temperature and pressure
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d) took pressure & temperature measurements e) took pictures
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f) Magellan 1989 Radar maps of planet Picture on next page is not true color. Radar has no color!
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Venus Express ESA project ( European Space Agency) Launched on 9 November 2005 arrived five-month journey Double Vortex at Venus South pole
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H. Information from spacecraft 1. Atmosphere a) Winds 200mph but only 4 mph on surface
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b) like our jet stream Over wider area on Venus
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c) convection cells Boiling phenomena 1 cell /hemisphere earth has 3
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Venus Transit 2004- Venus crossed in front of the Sun Next one was June 6, 2012 Next one 2117
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My Picture from 2004
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My Pictures from Venus Transit 2012
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H-alpha filter My Pictures from Venus Transit 2012
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