Space & Astronomy
1 / 15Explore the cosmos! Test your knowledge of planets, stars, space missions, and the universe.
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How many planets are there in our solar system?
About Space & Astronomy
Space & Astronomy is a free general knowledge quiz with 15 multiple-choice questions with a mix of 6 medium, 5 easy, 4 hard questions. Explore the cosmos! Test your knowledge of planets, stars, space missions, and the universe. A typical run takes about 7 minutes, hints are always one tap away, and your streak ticks up the first time you finish a game on a given day.
A few sample questions
1. How many planets are there in our solar system?
Answer: 8
There are 8 planets in our solar system. Pluto was reclassified as a 'dwarf planet' by the International Astronomical Union in 2006.
2. Who was the first person to walk on the Moon?
Answer: Neil Armstrong
Neil Armstrong took humanity's first steps on the Moon on July 20, 1969, during the Apollo 11 mission, famously saying 'That's one small step for man, one giant leap for mankind.'
3. What does a light year measure?
Answer: Distance
A light year is the distance that light travels in one year — about 5.88 trillion miles. It's used to measure the vast distances between stars and galaxies.
4. Which is the largest planet in our solar system?
Answer: Jupiter
Jupiter is so massive that more than 1,300 Earths could fit inside it. Its Great Red Spot is a storm that has been raging for at least 350 years.
5. The Sun is primarily composed of which element?
Answer: Hydrogen
The Sun is about 73% hydrogen and 25% helium. It converts roughly 600 million tons of hydrogen into helium every second through nuclear fusion.
Things you'll learn along the way
- The Milky Way is a barred spiral galaxy containing an estimated 100 to 400 billion stars. Our solar system is located on one of its spiral arms.
- The Hubble Space Telescope was launched on April 24, 1990, aboard the Space Shuttle Discovery. It has captured some of the most iconic images of deep space ever seen.
- The ISS typically houses a crew of 6 astronauts. It orbits Earth about every 90 minutes at an altitude of roughly 250 miles, meaning the crew sees 16 sunrises per day.
Frequently asked questions
What's a good follow-up after Space & Astronomy?
If you enjoyed this general knowledge quiz, try the Daily Challenge — five rotating questions, refreshed every 24 hours, that count toward your streak. You can also use the Surprise Me button on the homepage to land on a different game type for variety.
Can I print Space & Astronomy?
Yes — use the Print button at the top of the page for a clean question sheet, or "Print with Answers" to make an answer key. Printed sheets work well for group play at home, in a classroom, or at a senior center.
Will I lose my progress if I close the page?
Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, Space & Astronomy fits comfortably in one sitting.
How many questions are in Space & Astronomy?
Space & Astronomy has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
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