Sunday, February 3, 2013

Causes of Loss of Water on Planet Venus

http://astronesia.blogspot.com/
Planet Venus
Causes of Loss of Water in Planet Venus | First astronomers with modest telescopes see the planet Venus, they see the world is shrouded in clouds. On Earth, clouds means water, so |
early astronomers imagined a tropical world with constant rainfall. But the thick atmosphere on Venus is almost entirely made of carbon dioxide. In fact, the atmospheric pressure at the surface of Venus is 92 times more than what you would experience on Earth. If the cloud consists of a lot of carbon dioxide, then if there is water on the planet Venus?.

There is no water on the surface of the planet Venus. The average temperature on Venus is 461.85 ° C. Because water boils at 100 ° C, can not be on the surface. But if the water could be in the clouds and the atmosphere of Venus?

Astronomers have detected that Venus' atmosphere consists of water vapor 0.002%. Compare with the Earth's atmosphere, which contains 0.40% water vapor.

The scientists think that Venus has a formation similar to the Earth, and it certainly caused the same bombardment by comets that brought large amounts of water into the Earth. So why Venus water loss, while the Earth continues to awake the water?

Recent observations by ESA's Venus Express spacecraft has discovered that Venus traces of hydrogen and oxygen atoms away from the exploding planet Venus solar wind caused by the Sun. Every second, there are 2 x 1024 atoms of hydrogen are lost from Venus. Earth's magnetosphere protects our atmosphere from the Sun, the solar wind channeled throughout the Earth, and keep it from reaching our atmosphere.

Earth's magnetosphere is generated by the convection of material deep in the Earth. This occurs because the large temperature difference between the outer core and inner core. At some point, stop plate tectonics on Venus, the planet and stop removing the heat from the planet. Without the high temperature differences, the convection in it stops, eliminating its magnetosphere.

It is estimated that the atmosphere and Earth's surface has 100,000 times more water than Venus. And if the Earth does not have a protective magnetosphere, Earth will also lose water.
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