Multiple choice

What object in our Solar System has enough gravity to keep all the planets in orbit?

  1. the moon

  2. the Sun

  3. asteroids

  4. the Milky Way Galaxy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Sun contains over 99 percent of the mass in the Solar System. Because gravitational force is proportional to mass, the Sun's immense gravity dominates the system and keeps all the planets in their orbits.

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