An astronomer on earth observes a meteoroid in the southern, Ask an Expert

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An astronomer on Earth observes a meteoroid in the southern sky approaching Earth at a speed of 0.830c. At the time of its discovery, the meteoroid is 23.0 light-years from Earth. Compute the following.

1) The time required for the meteoroid to reach Earth, as measured with Earth bound astronomer

2) This time as measured with a tourist on the meteoroid

3) The distance to Earth as measured with the tourist

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