Multiple choice general knowledge science & technology

Which planet orbits the sun at the fastest speed

  1. Saturn

  2. Uranus

  3. Mercury

  4. Mars
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mercury orbits fastest because it's closest to the Sun (about 58 million km vs Earth's 150 million km). According to Kepler's laws, orbital speed decreases with distance. Mercury's average orbital speed is about 47.9 km/s, compared to Earth's 29.8 km/s. Saturn and Uranus are much farther and slower; Mars averages 24.1 km/s.

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