Question

Suppose an astronaut travels to Neptune, a distance of 4.4 billion kilometers from Earth, and then...

Suppose an astronaut travels to Neptune, a distance of 4.4 billion kilometers from Earth, and then returns to Earth. She travels at 0.8c. How long does the round trip take, according to her watch?

Group of answer choices

4.9 hours

3.15 hours

8.15 hours

6.67 hours

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