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This is 100% the hardest Astronomy quiz you will take today

This is the hardest astronomy quiz you’ll take today. Test your knowledge of space, planets, and stars now.

Trivia - This is 100% the hardest Astronomy quiz you will take today
Trivia - This is 100% the hardest Astronomy quiz you will take today

Think you know everything about the universe? This astronomy quiz will challenge your knowledge of planets, stars, galaxies, and cosmic phenomena.

Only true space enthusiasts will be able to score high. Do you know which is the largest satellite on Pluto? Or will you fail like most people who take this test? Prove what you know.

Astronomy quiz – hardest space questions

Take the challenge and see if you can answer these difficult questions. Share your results with your friends and see who has the best astronomy knowledge. Are you ready for the hardest quiz of the day?


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  • Question of

    What planets are called icy giants?

    • Uranus and Neptune.
    • Jupiter and Saturn.
  • Question of

    Who founded NASA?

    • Harry S. Truman.
    • John F. Kennedy.
    • Dwight Eisenhower.
  • Question of

    Which of these planets is composed mainly of helium and hydrogen?

    • Mars
    • Jupiter
    • Mercury
  • Question of

    Where is the Kuiper belt?

    • Beyond Neptune.
    • Between Mars and Jupiter.
  • Question of

    Comets come mainly from two places, which one isn’t one of them?

    • Oort Cloud.
    • Kuiper belt.
    • Asteroid belt.
  • Question of

    What’s the largest satellite on Pluto?

    • Nix
    • Styx
    • Charon
  • Question of

    Do all the giant planets have rings?

    • Yes
    • No
  • Question of

    The Sun is composed of 75% of:

    • Oxygen
    • Hydrogen
  • Question of

    An object whose diameter is between 100 µm to 50 m is considered:

    • An Asteroid.
    • A Meteoroid.
  • Question of

    What is Neptune’s twin planet?

    • Mars
    • Uranus
    • Saturn
  • Question of

    Is Uranus the first planet discovered by a telescope?

    • Yes
    • No
  • Question of

    What gives Mars its reddish appearance?

    • The predominant copper oxide on its surface.
    • The predominant iron oxide on its surface.

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Author: Tamara Dominas

My name is Tamara. I define myself as a bookworm and that's where I spend most of my time. I'm a chemist, with a developing passion for languages. I speak three languages and I'm already going for the fourth. I currently live in Rome, Italy, and I declare myself profoundly in love with this city. You can write to me: send me an email. If you want to know more about me, read full profile.

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