• Moiya McTier

Astronomy Fun Fact #72

Mercury is the closest planet to the Sun, but Venus (the second planet from the Sun) is actually the hottest planet in the solar system.

Mercury has a veeeery thin atmosphere while Venus' atmosphere is really thick and made mostly of carbon dioxide, which we all know is a greenhouse gas. So the average surface temperature on Venus throughout the year is more than 850 degrees Fahrenheit, but the hottest Mercury gets throughout its year is about 800 degrees.

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