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One light year(distance travelled by light in one year)is approximately 9 500 000 000 000 kin.The mass of the earth is 6 000 000 000 000 000 000 000 tonnes.The mass of a hydrogen at- om is 0.000 000 000 000 000 000 000 0017 g.
One light year (distance travelled by light in one year) is approximately 9 500 000 000 000 kin.The mass of the earth is 6 000 000 000 000 000 000 000 000 000.The mass of a hydrogen at- om is 0.000 000 000 000. 000 000 000 0017 g.