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