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VENUS

Venus, the second planet from the Sun, has intriguing features including a semimajor axis of 0.72 AU and a revolution period of just 0.61 years. Its diameter is 12,104 km, and it has a mass equivalent to 0.82 times that of Earth. With a surface gravity of 0.91 Earth and a scorching atmospheric pressure of 90 bars, Venus showcases intense geological activity, including active volcanoes like Sif Mons. The planet's surface remains obscured by thick clouds, making it a subject of ongoing study through radar imaging. Understanding Venus helps unravel the dynamics of planetary atmospheres.

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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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