Q:

Why is Venus the hottest planet?

A:

Quick 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.

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Full Answer

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.

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Related Questions

  • Q:

    Which planet has the highest average surface temperature and why?

    A:

    The planet with the highest average surface temperature is Venus, because of its thick atmosphere and its proximity to the sun. The average temperature on the surface of Venus is 860 degrees Fahrenheit.

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  • Q:

    Where is Venus located?

    A:

    Venus is the second closest planet to the sun, after Mercury. It is part of the solar system, along with Earth and six other planets, which is located in the Milky Way galaxy.

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  • Q:

    What are some facts about Venus?

    A:

    Venus, the second planet from the sun, is only a bit smaller than Earth. Venus was named after the Roman goddess of beauty and love and is the only one of the major planets named after a female deity.

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  • Q:

    What are 10 facts about Venus?

    A:

    NASA Solar System Exploration explains that Venus is the second-closest planet to the sun, orbiting at an average distance of 67 million miles. One year on Venus is equivalent to 225 Earth days; however, the planet's rotation takes 243 Earth days. So one Venus day actually equals 117 Earth days. The planet's atmosphere is primarily composed of carbon dioxide and nitrogen, while its clouds are made up of sulfuric acid.

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