The Solar System Quiz

The Solar System is a gravitationally bound collection of the Sun and all objects orbiting it, including eight planets, dwarf planets, moons, asteroids, and comets. It formed about 4.6 billion years ago from the collapse of a molecular cloud, creating a hot protostar surrounded by a protoplanetary disk from which the planets formed.

The Sun is the dominant mass in the system, containing about 99.86% of its total mass. Its core fuses hydrogen into helium, providing the energy that lights the planets and creates the heliosphere. The eight planets are categorized into inner terrestrial planets—Mercury, Venus, Earth, and Mars—and outer giants—Jupiter, Saturn, Uranus, and Neptune. Between Mars and Jupiter lies the asteroid belt, a region filled with many smaller rocky bodies. Beyond the outer planets is the Kuiper belt, home to icy dwarf planets like Pluto and numerous trans-Neptunian objects.

This quiz covers key aspects such as the Sun's role, the order and classification of planets, notable moons, and the significance of the asteroid and Kuiper belts within the Solar System.

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What the quiz asks

1. What percentage of the Solar System's total mass does the Sun contain?
2. Which planet is the closest to the Sun?
3. What are the four terrestrial planets in order from the Sun?
4. Which planets are classified as gas giants?
5. Where is the asteroid belt located?
6. Which region lies beyond Neptune and contains icy dwarf planets?
7. What type of star is the Sun classified as?
8. Which is the largest moon in the Solar System?
9. What defines a dwarf planet in the Solar System?
10. What forms the heliosphere around the Solar System?

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