Multiple choice

Which planet has the biggest satellite?

  1. Jupiter

  2. Earth

  3. Neptune

  4. Saturn

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

Jupiter's moon Ganymede is the largest satellite in our solar system, with a diameter of 5,268 km - even larger than the planet Mercury. While Saturn and Neptune have large moon systems too, none of their individual moons match Ganymede's size.

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