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Xeon gas in the F-10 layer of the atmosphere ( above 100,000 feet in elevation) is ionized by solar energy and emits blue light . This is why the night sky is clear and enables us to see distant stars at night. The emission of blue light also prolongs the period of apparent daylight so that we do not have a sudden shift from daylight to darkness as on the moon. This gradual progression of dark to light softens this shift and since it has been happening since the dawn of life on our world, we are, and all life forms here have become adapted to and in many cases are dependent upon this transitional phase. The day light sky on the moon appears predominately black and stars are visible unlike our sky here. On the moon, our sun’s measurable intensity is significantly higher than on Earth. The temperature on the moon in sunlight is above 200 F . Our atmosphere makes life on earth possible.
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