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What is the distance of the star (in km) from which a light takes 3 x 109 year to reach the earth? The speed of light, is C = 3 x 108 m/s.

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What is the distance of the star (in km) from which a light takes 3 x 109 year to reach the earth? The speed of light, is C = 3 x 108 m/s.




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