1) would you believe during the explosion of big bang the size of our universe was 10-36 m. 
2)usually everyone loves moon. did anyone know that every year moon comes 3.7 cm close to earth?
3) does anybody knows a place on this earth where people can indirectly watch the earth's rotation? well there is a place named "pantheon" in paris. There people can observe the rotation of the earth indirectly by means of a "foucault" pendulum.
4)It(light ray emitted by moon) takes "8.3" seconds to reach the earth's surface. where as a sun ray takes 8.248 minutes.

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