150+ Astronomy Trivia Questions and Answers

AlexanderByAlexander Morillo Hours

How well do you know the universe? Test yourself with 150+ astronomy trivia questions about planets, stars and space. Reveal the options and check answers on the page.

Astronomy Trivia Questions and Answers

Choose a question and make your best guess. Reveal the answer options when you are ready, then check the correct answer before moving on.

  1. What is the largest galaxy in the so-called Local Group?
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    • Milky Way.
    • Andromeda Galaxy.
    • Triangle Galaxy.
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  2. What is the largest natural satellite in the entire solar system?
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    • The Moon
    • Eris
    • Ganymede
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  3. What is the largest satellite of Uranus?
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    • Ariel
    • Titania
    • Oberon
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  4. What is the main element that makes up the nucleus of the planet Earth?
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    • Iron
    • Nickel
    • Sulphur
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  5. What is the measure of the Earth in the equator?
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    • 1,314 kilometers
    • 40,075 kilometers
    • 9,254 kilometers
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  6. What is the most radioactive planet in the solar system?
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    • Saturn
    • Jupiter
    • Mars
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  7. What is the planet most similar to Earth in size, mass, and composition?
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    • Venus
    • Jupiter
    • Saturn
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  8. What is the planet with the most natural satellites in the solar system?
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    • Uranus
    • Jupiter
    • Saturn
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  9. What is the smallest planet in our solar system?
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    • Mercury
    • Mars
    • Earth
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  10. What is the sun?
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    • A planet
    • A star
    • An asteroid
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  11. What material are the honeycombs made of?
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    • Honey
    • Wax
    • Bark
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  12. What planet does the “Europe” satellite orbit?
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    • Saturn
    • Neptune
    • Jupiter
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  13. What planet has a longer year?
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    • The Earth
    • Mars
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  14. What planet in the solar system does not have natural satellites?
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    • Uranus
    • Mercury
    • Earth
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  15. What planets are called icy giants?
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    • Uranus and Neptune.
    • Jupiter and Saturn.
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  16. What region of the solar system do comets come from?
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    • Asteroid belt.
    • OORT cloud.
    • Interstellar space.
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  17. What was the name of Neptune's biggest storm?
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    • The Great White Spot.
    • The big blob.
    • The Great Dark Spot.
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  18. What's Eris?
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    • Dwarf planet
    • Satellite of Uranus
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  19. What's the closest star system to the Sun?
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    • Alpha Centauri.
    • Next Centauri.
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  20. What's the largest satellite on Pluto?
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    • Nix
    • Styx
    • Charon
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  21. When is it said that life on Earth will end?
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    • It is not possible to calculate it.
    • When all the hydrogen runs out in the sun, within 5000 million years.
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  22. Where is the Kuiper belt?
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    • Beyond Neptune.
    • Between Mars and Jupiter.
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  23. Where is the largest canyon in the Solar System?
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    • Mars
    • Jupiter
    • Saturn
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  24. Where is the Oort cloud?
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    • At the edge of the solar system.
    • Between the orbits of Mars and Jupiter.
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  25. Which are the so-called giant gaseous planets?
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    • The Earth, Saturn, Uranus.
    • Jupiter, Saturn, Uranus and Neptune.
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  26. Which constellation does Sirius belong to?
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    • Southern Cross.
    • Can major.
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  27. Which gas is responsible for the blue color observed on Neptune?
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    • Propane
    • Methane
    • Ethane
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  28. Which of Jupiter's satellites could contain liquid water under its surface?
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    • Europa
    • Callisto
    • Ganymede
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  29. Which of these dwarf planets is not a trans neptunian object?
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    • Eris
    • Ceres
    • Sedna
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  30. Which of these is an outer planet?
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    • Mars
    • Earth
    • Neptune
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  31. Which of these planets is composed mainly of helium and hydrogen?
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    • Mars
    • Jupiter
    • Mercury
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  32. Which one of the modern contellations is the largest?
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    • Crux
    • Hydra
    • Pegasus
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  33. Which planet has a lower density than water?
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    • Saturn
    • Neptune
    • Uranus
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  34. Which planet has the shortest day of the solar system?
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    • Neptune
    • Uranus
    • Jupiter
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  35. Which planet in the solar system is considered the coldest?
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    • Uranus
    • Saturn
    • Mercury
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  36. Which satellite has seas and methane atmosphere?
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    • Hyperion
    • Japetus
    • Titan
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  37. Which spiral arm of the Milky Way is the solar system in?
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    • Orion's arm.
    • Perseus' arm.
    • Sagittarius arm.
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  38. White dwarfs are, along with red dwarfs, the most abundant stars in the universe: True or false?
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    • True
    • False
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  39. Who calculated Halley's comet's orbit?
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    • Edward Halley.
    • Edmund Halley.
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  40. Who created the first star catalogue?
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    • Hipparchus of Nicaea.
    • Hypatia of Alexandria.
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  41. Who did the calculation of Halley's comet's orbit?
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    • Elliott Halley.
    • Edward Halley.
    • Edmund Halley.
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  42. Who first observed Saturn's rings (1610)?
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    • Galileo Galilei.
    • Christiaan Huygens.
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  43. Who founded NASA?
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    • Harry S. Truman.
    • John F. Kennedy.
    • Dwight Eisenhower.
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  44. Who was the first person to calculate the circumference of the Earth?
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    • Eratosthenes.
    • Thales of Miletus.
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Alexander

I'm passionate about languages. I work with translations, real-time language interpretation and write articles. On This Quiz I publish mostly history, movie and general knowledge quizzes. You can write to me: send me an email

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