Solar System and Space Quiz: How Much Do You Know About the Universe?
From planets to black holes, test your space knowledge and see how well you know the Solar System, stars, and universe.
About this quiz
Space is full of facts that feel familiar until you have to choose the right answer. This quiz takes you from nearby planets and moons to the Sun, Pluto, black holes, light-years, galaxies, and early human spaceflight.
After working through 10 multiple-choice questions, you’ll get a quick sense of how strong your universe knowledge really is. Use it as a fun challenge, a refresher on astronomy basics, or a way to spot which cosmic facts deserve another look.
Possible results
🌍 Earthbound Thinker
SCORE RANGE: 0 – 49
The universe is vast, and there's still a galaxy of knowledge waiting for you! You've got the curiosity — you just need a few more trips around the Sun to sharpen your space smarts. The good news? Space is endlessly fascinating once you start exploring.
🚀 Quick challenge: Pick one question you got wrong and look it up — you might fall down a wonderful cosmic rabbit hole.
🛸 Space Cadet
SCORE RANGE: 50 – 69
You've got a solid foundation! You know your planets from your moons and your stars from your black holes — but a few cosmic mysteries still elude you. You're well on your way to earning your wings in the galactic academy.
🌟 Did you know: The Milky Way and Andromeda galaxies are on a collision course — but don't worry, it won't happen for another 4.5 billion years.
🔭 Galactic Explorer
SCORE RANGE: 70 – 89
Impressive! You clearly have a strong grasp of our Solar System, stellar science, and space exploration history. A couple of tricky questions slipped past you, but you know your way around the cosmos with confidence.
✨ So close: Review the questions you missed — you were likely just one fact away from the top tier. The universe rewards the curious!
🌌 Cosmic Mastermind
SCORE RANGE: 90 – 100
Out of this world! You aced nearly every question — from Ganymede to Gagarin, from light-years to dwarf planets. Your space knowledge is truly stellar. NASA would be proud.
🏆 Your move: Challenge a friend to beat your score and see if anyone else in your orbit can match your cosmic expertise!
Quiz questions
Which planet is closest to the Sun?
What is the largest moon in our Solar System?
How many moons does Mars have?
What type of star is our Sun?
What is the approximate surface temperature of the Sun?
Why was Pluto reclassified as a dwarf planet in 2006?
What is a black hole?
What is a light-year?
What galaxy do we live in?
Who was the first human to travel to space?
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