Multiple choice

A planet orbiting the Sun...

  1. Always has the same orbiting speed

  2. Always has the same orbiting velocity

  3. Moves faster when it's closest to the Sun

  4. Moves slower when it's closest to the Sun
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

According to Kepler's Second Law, a planet sweeps out equal areas in equal times, which requires it to move faster when it is closer to the Sun (perihelion) and slower when it is farther away (aphelion).

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