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Why is Mercury so cold at night

Its so close to the sun

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http://en.m.wikipedia.org/wiki/Mercury_(planet)

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Excuse me. I am too young to play with matches or look things up myself!
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If you consider 392' F cold! During the day it's up to 750' F.

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at night it goes to -270 fahrenheit

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damn
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It is because it does not have an atmosphere; it has extremely long nights and the exposure to the daily cold at night. However, during the day it is warmer because of the atmosphere, which makes the temperatures bearable. Visit sciencemonster.com.

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