Question

Help!! (oh yeah again!)

Question :-

When the Voyager 2 spacecraft sent back pictures of Neptune during its flyby of that planet in 1989, the spacecraft’s radio signals traveled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft? Give your answer in kilometers, using powers-of-ten notation.
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Answer 1

Voyager 2 traveled 12 years at an average velocity of 19 kilometers a second (about 42,000 miles an hour) to reach Neptune, which is 30 times farther from the Sun than Earth is. Voyager observed Neptune almost continuously from June to October 1989.

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Answer 2

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• Neptune is an average distance of 4.5 10 km from the Sun. Estimate the length of the Neptunian year using the fact that the Earth is 1.50 10 km from the Sun on average.

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