Light Years =distance = the speed of light =300,000 km/s =the further you look into the distance, the further back in time you are looking = how far light. - ppt download
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SOLVED:(II) A light-year is the distance light travels in one year (at speed =2.998 \times 10^{8} \mathrm{m} / \mathrm{s} ) . (a) How many meters are there in 1.00 light-year? (b) An
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