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Why does moon have very cold and very ho...

Why does moon have very cold and very hot temperature variations e.g., from `-190^(@)C` to `110^(@)C` even though it is at the same distance from the sun as the earth is?

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Hint. Moon does not have an atmoshpere.
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Why does moon have very cold and very high temperature variations e.g. from -190^(@) to 110^(@)C even though it is at the same distance from the sun as the Earth is?

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The sun having surface temperature Ts radiates like a black body. The rasius of sun is Rs and earth is at a distance R from the surface of sun. Earth absorbs radiations falling on its surface from sun only and is at constant temperature T. If radiations falling on earth's surface are alomost parallel and earth also radiates like a blackbody, then

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