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VENUS

VENUS. Basic Data:. Semimajor Axis: 0.72 AU Revolution Period: 0.61 years Diameter: 12104 km Mass: 0.82 Earth Density: 4.3 g/cm 3 Surface Gravity: 0.91 Earth Rotation Period: 243 days Reflectivity: 0.7 Atmospheric Pressure: 90 bars. Landscape.

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VENUS

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  1. VENUS

  2. Basic Data: • Semimajor Axis: 0.72 AU • Revolution Period: 0.61 years • Diameter: 12104 km • Mass: 0.82 Earth • Density: 4.3 g/cm3 • Surface Gravity: 0.91 Earth • Rotation Period: 243 days • Reflectivity: 0.7 • Atmospheric Pressure: 90 bars

  3. Landscape Two continents: Aphrodite, about the size of Africa on the Venusian equator. Ishtar, on the North, contains Maxwell mountains.

  4. Aphrodite

  5. Ishtar

  6. Normal Venus All the pictures we have are radar images. The surface of Venus cannot be seen because of the clouds.

  7. Venera 7 (Russian) Images

  8. Venera 7 Images

  9. Surface Activity: • Very few craters • The edges of the craters are sharp. • Recent craters • Small number means big geological activity with lots of volcanoes and lava flow.

  10. Impact Basin from the Lavinia region

  11. Sif Mons There are two different kinds of volcanoes on Venus. Sif Mons is what we are accustomed to. A regular volcano with lava flow.

  12. Lava Flow:

  13. Pancake Volcanoes: Caused by very thick lava

  14. Tectonic features:

  15. Atmosphere: • 90 bars • Mostly CO2 • High temperature 700K. • Runaway Greenhouse Effect. • Water evaporates, then dissociates in UV light, H2 escapes, O2 binds with C to form CO2.

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