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Asked by khushal305 | 31st May, 2009, 07:32: PM

Expert Answer:

Only 20 percent of the sunlight that hits Venus makes it through the cloud cover, while the other 80 percent is reflected back into space. This reduced sunlight doesn't make Venus a cold world, however, because the thick carbon dioxide atmosphere traps the planet's heat.

Surface temperatures are hot enough to melt lead. The surface pressure on Venus is the crushing equivalent of being nearly a mile deep in Earth's ocean. The landscape, covered in volcanic rock, is desolate and waterless, but rich in sulfur. Venus's atmosphere is more than 96 percent carbon dioxide, with 3 percent nitrogen and traces of other gases.

Enshrouding Venus are three distinct cloud layers. Water vapor there ranges from a few parts per million at the top of the cloud deck to a few tens of parts per million at the base. Cloud droplets, however, are formed of extremely concentrated sulfuric acid. So ity has a high flux of solar ultraviolet radiation that floods the cloud deck.

Answered by  | 31st May, 2009, 08:17: PM

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