shilong-ds

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light year the distance in the space is to long to use mile.1light year= 9460730472580800 metres (exactly). ≈ 5878625 million //miles// the Milky Way galaxy is 100,000 light year across= 586569600000000000 mile supernova  media type="youtube" key="DNDnZb-nEOc" height="412" width="641"