SPACE VIDEO OF THE DAY : WHY IS THE SKY DARK AT NIGHT?


WHY IS THE SKY DARK AT NIGHT ? ASTRONOMERS EXPLAIN WHY

CLICK ON THE LINK BELOW THE PICTURE TO VIEW THE VIDEO




http://www.youtube.com/watch?v=TFwtJC9_dXs&list=PL499D4DD5A4D67C6C&index=18
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