Question

Planets and other space objects stay together in our Solar system, because:

• A. Of the stars of Andromeda galaxy
• B. Planets exert gravity on each other
• C. Pluto is no more considered a planet
• D. Of the Sun's immense gravity

Answer 1

The correct option is D Of the Sun's immense gravity

The Sun is the most massive object in our Solar system which contributes to about $99.8\%$ of the mass of the Solar system. Because of this, the gravitational pull of the Sun is stronger than that of any other object in the Solar system. This immense gravity holds together a system of eight planets, dozens of dwarf planets, countless asteroids, comets, and meteors.