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What is the average temperature of Neptune?

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Quick Answer

The mean temperature of Neptune is -353 degrees Fahrenheit, which drops to -346 degrees F at the planet's cloud tops. Along with Uranus, Neptune is categorized as an ice giant, primarily due to its icy composition.

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Full Answer

The atmosphere of Neptune mainly consists of helium and hydrogen, with small amounts of methane. Pressures and temperatures vary at different elevations. The warmest areas on the planet are located on its southern polar region, according to astronomical observations taken by scientists in 2007. The temperature in the upper cloud stratum was found to be around 50 degrees F hotter than the rest of Neptune. The bluish color of the planet is attributed to leaked methane, which is the result of this occurrence.

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