Multiple choice general knowledge science & technology

Which is the natural satelite that is closet to its parent planet?

  1. Deimos

  2. Phobos

  3. Callisto

  4. Sinope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phobos orbits closer to Mars than any other moon in our solar system, at an average distance of only 9,376 km from Mars' surface. It completes an orbit around Mars in just 7 hours and 39 minutes, which is faster than Mars' rotation period. Phobos is gradually spiraling inward and will eventually crash into Mars or break apart into a ring.

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