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Unit 10 & 11 Light years, Theories and Characteristics of the Universe

Unit 10 & 11 Light years, Theories and Characteristics of the Universe. Light year is: . Distance that light travel in a vacuum in one year, about 9.5 trillion km- which is used to record distances between stars and galaxies. Light year is : . Light year is not: .

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Unit 10 &amp; 11 Light years, Theories and Characteristics of the Universe

Unit 10 & 11 Light years, Theories and Characteristics of the Universe