Why is Venus the hottest planet?

Answer

Venus has surface temperatures of up to 900 degrees Fahrenheit because it is much closer to the sun and has a thick, high-pressure atmosphere. When sunlight penetrates the atmosphere of Venus, it does not have the energy to escape efficiently and continues to heat the surface.

The crushing atmosphere of Venus consists of up to 96 percent carbon dioxide, which is also one of the major greenhouse gases on Earth. Venus also has 90 times the pressure of Earth's atmosphere. Carbon dioxide is a major greenhouse gas because its atomic structure allows it to absorb energy more easily and radiate it slowly, rather than allowing it to pass through unaffected by the toxic conditions on Venus.

Venus' orbit is also much closer to the sun than the Earth's orbit. Solar radiation strikes Earth more diffusely than it does on Venus, which heats Venus more than Earth. Mercury is the closest planet to the sun and gets even more heat than Venus during its day. However, the relative lack of atmosphere on Mercury means that this heat radiates away on the night side and heats up again during the day. These two factors combine to make Venus the hottest planet in the solar system.

Q&A Related to "Why is Venus the hottest planet?"
Venus is very hot because it has a very dense atmosphere made up mostly of carbon dioxide. Carbon dioxide is a greenhouse gas that traps the energy from the sun.
http://www.ask.com/web-answers/Science/Astronomy/w...
It is very very very close to the Sun. Although Mercury is the closest planet to the sun, it is only the second hottest planet after Venus. Venus gets hotter as the thick carbon Dioxide
http://wiki.answers.com/Q/Why_Venus_is_the_hottest...
Venus's atmosphere is primarily composed of carbon dioxide - the primary green house
http://www.chacha.com/question/why-is-venus-the-ho...
the surface temperature of an object depends on how much heat it generates by itself, how much heat it receives from outside, and how much heat it retains. both mercury and venus
http://answers.yahoo.com/question/index?qid=201307...
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