Multiple choice

What is the approximate rate of Earth’s revolution around the sun?

  1. 1° per year

  2. 1° per day

  3. 15° per year

  4. 15° per day

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

1° per day is the approximate rate of Earth’s revolution around the sun. The formula which is used to calculate this is Kepler’s third law which states that the squares of the orbital periods of planets are directly proportional to the cubes of the axes of the orbits. Earth's orbit is an ellipse, i.e. 360° and it takes 365.25 days to go 360°. So in one day, Earth moves 1.0145833°.

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