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how far is 137 light years from earth how long is 137 light years from earth how far is 137 light years away from earth how long is 137 light years away from earth how much is 137 light years away from earth how long to travel 137 light years from earth how much is 137 light years in earth years how far is 124 light years from earth how far is 4.2 light years in days how far is 128 light years
