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