Venus A. Earth Sister Planet. 1. Same Size, Mass, Density 2. Unlike temperature and pressure conditions 3. 0.7 A.U from the Sun.

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Presentation transcript:

Venus A. Earth Sister Planet

1. Same Size, Mass, Density 2. Unlike temperature and pressure conditions A.U from the Sun

B. Atmosphere 1. Clouds contain sulfuric acid some water

2. atmosphere 98% Carbon Dioxide

3. Pressure 90 X Earth Pressure

a) carbon dioxide is why pressure is so great b) on Earth combined with water to form limestone

C. Rotation Earth Days to spin on axis one time 2. Retrograde ( backwards, Sun would rise in the West)

D. Revolution 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

E. Temperature F 2. Should be 200 o F 3. Caused by the Greenhouse effect

F. Surface 1. Study by Radar 2. Found Huge mountains 3. Found Large volcanoes

Volcanoes?

Volcanoes?

Active? 700 miles across lightning Sulfur dioxide

Iceland Volcano Eyjafjallajokull had lightning Maybe Venus has active volcanoes /pronounce-eyjafjallajokull

4. Long Trough a) 900 miles long b) like East Africa rift valley on Earth

G. Unmanned Spacecraft 1. USA Mariner and Pioneer

a) only orbiters b) 5 c) observe clouds and atmosphere

2. USSR Venera 1-16 a) orbiters b) landed 8 times

c) destroyed by high temperature and pressure

d) took pressure & temperature measurements e) took pictures

f) Magellan 1989 Radar maps of planet Picture on next page is not true color. Radar has no color!

Venus Express ESA project ( European Space Agency) Launched on 9 November 2005 arrived five-month journey Double Vortex at Venus South pole

H. Information from spacecraft 1. Atmosphere a) Winds 200mph but only 4 mph on surface

b) like our jet stream Over wider area on Venus

c) convection cells Boiling phenomena 1 cell /hemisphere earth has 3

Venus Transit Venus crossed in front of the Sun Next one was June 6, 2012 Next one 2117

My Picture from 2004

My Pictures from Venus Transit 2012

H-alpha filter My Pictures from Venus Transit 2012

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