Venus is a rocky planet and the second planet from the Sun, orbiting it every 224.7 Earth days. Venus spin slowly backwards as it orbits the Sun, causing its rotational period to be the longest in the solar system, at about 243 Earth days. It is slightly smaller than the Earth and probably has a similar internal structure, consisting of a semi solid metallic core, surrounded by a rocky mantle and crust. Venus is the brightest object in the sky after the Sun and the moon because its atmosphere reflects sunlight strongly. the main component of the atmosphere is carbon dioxide, which traps the heat in the greenhouse effect far stronger than that on the Earth. As a result, Venus is the hottest planet, with the maximum surface temperature of about 480 degree celsius. The thick cloud layers contains droplets of sulphuric acid and are driven around the planet by winds at speeds of upto 360kmph.
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