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verr. maj
in class worksheet 10 jan and homework 1
are
1. the universe is so large that astronomers talk about distance using a unit of length called parsec. there
3.0857 x 101 meters in a parsec. the north star, also called polaris, has been used for thousands of ye
navigational aide. the star is 133 parsecs from earth how long does it take light from polaris to reach earth