Multiple choice

Which of the following in not a planet?

  1. Pluto

  2. Earth

  3. Mars

  4. Mercury
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pluto was reclassified from a planet to a dwarf planet by the IAU in 2006 because it has not cleared its orbital neighborhood. Earth, Mars, and Mercury are all classified as planets.

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