Lesson 9.4 Kepler's Laws and Newton's Universal Law of Gravitation Answers

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The mass of the Sun is 2 × 1030 kg, and the distance between Neptune and the Sun is 30 AU. What is the orbital period of Neptune in Earth years?

A
30 Earth years
B
164 Earth years
C
3.8 × 1011 Earth years
D
2.3 × 1017 Earth years
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The table shows information about two of the major moons of Uranus.MoonOrbital Period (days)Average Distance from Uranus (km)Miranda0.319129,390Titania 8.71435,910What is the average distance between Miranda and Uranus?

A
2.84 × 104 km
B
1.29 × 105 km
C
1.47 × 106 km
D
4.65 × 107 km
3

If it takes a planet 2.8 × 108 s to orbit a star with a mass of 6.2 × 1030 kg, what is the average distance between the planet and the star?

A
1.43 × 109 m
B
9.36 × 1011 m
C
5.42 × 1013 m
D
9.06 × 1017 m

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