Space / 100 QUESTIONS

Space Quiz: 100 Questions and Answers.

How well do you know the Solar System and the universe beyond it? This space quiz brings together 100 questions about planets, moons, stars and space exploration. Each round moves from easier astronomy trivia towards a harder finish, with multiple-choice answers and a score at the end.

Set 1 of 5

Your round. Your level.

Start answering below, or jump straight to a harder level.

Start at question 1. Play all 20, from Easy to Very hard.

Changing the set or starting level begins a fresh round. Your first answer counts; correct answers appear in green.

YOUR SUBJECT / YOUR NEXT CHALLENGE

What’s in this space quiz?

Each of the five sets contains 20 questions, with five questions at each difficulty. Choose Easy for the full round, Medium for 15 questions, Hard for 10 or Very hard for five.

Topics in the mix

  • Planets, moons and the Solar System
  • Stars, galaxies and astronomy
  • Astronauts, spacecraft and missions

Hosting a quiz? Open the question and answer list below, choose a set and print separate player and answer sheets. Read the quiz-night instructions.

Space Quiz questions and answers · quizmaster view

Spoilers ahead. Pick a set for your quiz night, then read the questions aloud or print separate question and answer sheets. One point per correct answer.

Set 1 · Space

  1. Easy
    What is the largest planet in the Solar System?

    Answer: Jupiter

  2. Easy
    Which Apollo mission was the first one to land on the Moon?

    Answer: Apollo 11

  3. Easy
    What was the name of the first artificial Earth satellite, launched by the Soviet Union in 1957?

    Answer: Sputnik 1

  4. Easy
    How many planets make up our Solar System?

    Answer: 8

  5. Easy
    How many planets are in our Solar System?

    Answer: Eight

  6. Medium
    What star is closest to the sun?

    Answer: Proxima Centauri

  7. Medium
    Which one is not a name of a Galilean moon revolving around Jupiter?

    Answer: Athena

  8. Medium
    Mars lower density and size gives it a mass about how much that of Earth?

    Answer: 1/10

  9. Medium
    By what name was the closest planet to the Sun called by the Greeks?

    Answer: Hermes

  10. Medium
    How long does it take Saturn to complete one orbit around the Sun?

    Answer: just under 30 years

  11. Hard
    According to the distance between the planets and the Sun, Jupiter is situated between which two planets in the Solar system?

    Answer: Mars and Saturn

  12. Hard
    How many major planets are there in the Solar System?

    Answer: 8

  13. Hard
    The moons, Miranda, Ariel, Umbriel, Titania and Oberon orbit which planet?

    Answer: Uranus

  14. Hard
    Which is the largest of Uranus moons?

    Answer: Titania.

  15. Hard
    Which is the hottest planet of the Solar System?

    Answer: Venus

  16. Very hard
    In what year did 23-year-old American Clyde Tombough discover Pluto, or Planet X, as it was termed then?

    Answer: 1930

  17. Very hard
    A comet's gaseous envelope (which creates the tail) is called what?

    Answer: The coma

  18. Very hard
    The crew of which Apollo mission spent the longest time on the Lunar surface?

    Answer: Apollo 17

  19. Very hard
    How long is one day on the planet Neptune?

    Answer: Just over 16 hours

  20. Very hard
    Which of these is a celestial body, which produces the effect known as shooting star?

    Answer: Meteoroid

Questions adapted from Open Trivia Database and OpenTriviaQA, under CC BY-SA 4.0. Selected, filtered and arranged into fixed rounds. Sources & editorial notes.

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