चाँद पर इतने सारे गढ्ढे क्यों है?

चाँद पर इतने सारे गढ्ढे क्यों है?
Why are there so many craters on the moon?

#moon
#space
#universe
#science
#galaxy
#wigyan
#universeexpansion
#knowledge
#mundishfact

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