Planet Quiz

Can you answer these questions about the planets in our solar system?
Quiz by
NObbincombat
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Last updated: May 26, 2026
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First submittedMay 26, 2026
Times taken10
Average score66.7%
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1. What is the closest planet to the Sun?
Neptune
The Milky Way
Mercury
Venus
2. What is the biggest planet in our solar system?
Earth
Jupiter
The Sun
Neptune
3. What is the hottest planet?
Jupiter
Mercury
Mars
Venus
4. What planet is named after the Roman messenger of the gods?
Uranus
Saturn
Mars
Mercury
5. Which combinations of these planets are the gas giants?
Jupiter, Saturn, Uranus, and Neptune are all gas giants.
Venus, Jupiter, Saturn, Uranus
Jupiter, Saturn, Uranus, Neptune
Mercury, Venus, Earth, Mars
Mars, Jupiter, Saturn, Neptune
6. What is the study of outer space?
Astronomy is the study of outer space.
Astronomy
Astrology
Taxonomy
Planetology
7. What is the coldest planet in our solar system?
Pluto
Neptune
Jupiter
Uranus
8. Which planet has the most moons?
Uranus
Jupiter
Neptune
Saturn
9. Click the planet that doesn't have any moons.
Neptune
Mars
Mercury
Uranus
10. What is the largest dwarf planet?
Haumea
Pluto
Makemake
Eris
11. Which dwarf planet is not in the Kuiper Belt?
Pluto
Haumea
Makemake
Ceres
12. Which planet is known for it's unique direction of rotation?
Earth
Neptune
Jupiter
Uranus
13. What is the smallest dwarf planet out of these options?
Eris
Haumea
10 Hygiea
Makemake
14. Which planet is believed to have water in the past?
Uranus
Jupiter
Neptune
Mars
15. Which planet is 3rd smallest?
Earth
Venus
Neptune
Mars
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