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The temperatures on Earth are moderated by the atmosphere and by the oceans, which absorb and transfer heat from the equatorial regions (most notably as hurricanes). Precipitation can either increase or decrease local temperatures. The hottest regions on Earth seldom exceed 50°C (120° F), and the coldest places have been as low as -89°C (-130°F). Most of the world's inhabited regions average between -10° and 30°C (15° to 90°F). On Mercury, there is no liquid water and virtually no atmosphere. The only regions with temperatures close to Earth's are near Mercury's poles, where solar radiation is the least intense. On the sunward side, it is hot enough to melt lead, 427°C (800°F). On the side facing away, the vacuum of space allows the temperatures to drop to -183°C (-300°F) As the planet slowly turns (one rotation every 60 days), areas along the terminator are rapidly heated or cooled when transitioning from night to day or day to night. The difference in the daytime heat is due to Mercury's closeness to the Sun, an average of just 1/3 the distance from Earth to the Sun.

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13y ago

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