37. The distance between the Earth and a star is 12 light-years in the Earth's reference frame. How fast would one have to travel in a spaceship to

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37. The distance between the Earth and a star is 12 light-years in the Earth's reference frame. How fastwould one have to travel in a spaceship to make the trip from the Earth to the star in 12 years= accordingto someone in the spaceship? (a) 0.?1 c (b) 0.99 c (c) 0.89 c (d) 0.95 c