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Merucry has an extremely thin atmosphere because the gas particles would move so fast that they escape Mercury's
gravity into space. In Mercury's atmosphere consists of the following gases : Potassium, Sodium, Oxygen, Argon, Helium,
Nitrogen, and Carbon Dioxide. During the day, it has a temperature of about 430 degrees Celcius. However, at night,
because of its thin atmosphere the heat flees into space, causing the temperature drops to -170 degrees Celcius.
This results in Mercury having the greatest range of temperatures then any other planet in our solar system.
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