chapter11notes - End of Chapter 11 Study Guide Introduction...

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End of Chapter 11 Study Guide Introduction • Surface not visible optically because of thick atmosphere • Morning Star/Evening Star popular name - because you normally see it for only about 3 hours afer sunset and 3 before sunrise • USSR Venera missions and USA Magellan mission provided nearly all our best data • Venus has no natural satellites Orbit/Rotation • Takes a bit longer to rotate (243 days) than to make a complete orbit (225 days); (compare with Earth: rotation in 24 hours, orbit 365 days) - rotate in a clockwise direction called retrograde motion- very slow- one complete roation every 243 Earth days -This slow retrograde rotation of 243 Earth days and the direct revolution around Sun of 225 days combines to give a Venusian day (from noon one day to noon the next) of 117 Earth days Atmosphere/Greenhouse/Hydrosphere • Venus atmosphere is 96% carbon dioxide greenhouse effect begins with incoming short wavelength light energy from Sun warming a planet’s surface, but ends up with a surface or near-
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chapter11notes - End of Chapter 11 Study Guide Introduction...

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