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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?

30 Earth years

164 Earth years

3.8 * 1011 Earth years

2.3 * 1017 Earth years

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Answers (1)
  1. Today, 00:09
    0
    T² = 4π²a³/GM

    4π²/GM = 1

    T = 1*√ (a³)

    T = √ (30³)

    T = 164.3

    164 Earth years
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