Physics

Halley’s comet orbits the Sun with a period of 76.2 years.
a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit

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asked by Reese
  1. There is a simple form of Kepler's Third law for objects orbiting the sun.

    If the period P is in years and the semimajor axis a is in a.u.,

    P^2 = a^3

    You know that P = 76.2 yr

    Solve for a

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    posted by drwls

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