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An astronomer on Earth observes a meteoroid in the southern sky approaching the Earth at a...

An astronomer on Earth observes a meteoroid in the southern sky approaching the Earth at a speed of 0.840c. At the time of its discovery the meteroid is 15.5 lightyears from the Earth. (a) Calculate the time interval required for the meter to reach the Earth as measured by Earthbound astronomer. yr (b) Calculate this time interval as measured by a tourist on the meterd. yr (c) Calculate the distance to the Earth as measured by a tourist.

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