Space Quiz Questions With Answers: 37 Easy to Hard
2026-10-23 · 7 min read
These space quiz questions with answers take you from the planets you learned about at school to the far edge of the Solar System and beyond. We wrote 37 questions in three rounds. Easy covers the planets, the Moon and the first people in space. Medium moves on to famous telescopes, record-breaking missions and the strange facts that make each planet different. Hard goes after giant moons, volcanoes, comets and the spacecraft now drifting between the stars. Every question has one correct answer in bold right underneath, followed by a one-line fact you can share. The Easy round works well as a space quiz for kids, while the Medium and Hard rounds suit adults and astronomy fans. When you want real pressure, the live version gives you 10 seconds per question against a real opponent.
Play it live
Knowing the answer on paper is easy. Finding it in under 10 seconds while someone else races you is not. Play the live space quiz and face another player on the same 7 questions, with question 7 counting double. Want pictures instead? Try the space pictures quiz, or jump into Quick match for a random opponent on any topic.
Easy space quiz questions
Which planet is known as the Red Planet?
Answer: Mars
Iron oxide, the same compound as rust, gives its dusty surface that colour.Which is the largest planet in our Solar System?
Answer: Jupiter
It is more than twice as massive as all the other planets put together.Which planet is closest to the Sun?
Answer: Mercury
It is also the smallest of the eight planets.How many planets are there in our Solar System?
Answer: 8
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.Who was the first person to walk on the Moon?
Answer: Neil Armstrong
He stepped onto the lunar surface in July 1969.Who was the first human to travel into space?
Answer: Yuri Gagarin
He orbited Earth aboard Vostok 1 on 12 April 1961.Which planet is most famous for its bright rings?
Answer: Saturn
Its rings are made mostly of chunks of ice with some rock and dust.What is the name of our home galaxy?
Answer: The Milky Way
It is a spiral galaxy containing hundreds of billions of stars.What is the star at the centre of our Solar System?
Answer: The Sun
It holds about 99.8 percent of all the mass in the Solar System.What is Earth's only natural satellite?
Answer: The Moon
The same side of the Moon always faces Earth.What do we call a rock from space that survives its fall and lands on Earth?
Answer: A meteorite
While it is still burning through the sky it is called a meteor.What is a group of stars that forms a named pattern in the sky called?
Answer: A constellation
The International Astronomical Union recognises 88 official constellations.
Medium space quiz questions
Which is the hottest planet in our Solar System?
Answer: Venus
Its thick carbon dioxide atmosphere traps heat, so it is hotter than Mercury.Which planet has the giant storm called the Great Red Spot?
Answer: Jupiter
The storm is wider than the whole Earth.Which planet spins tilted on its side?
Answer: Uranus
Its axis is tilted by about 98 degrees, so it rolls around the Sun.In which year was Pluto reclassified as a dwarf planet?
Answer: 2006
The International Astronomical Union made the decision that August.Which Apollo mission first landed humans on the Moon?
Answer: Apollo 11
Buzz Aldrin joined Neil Armstrong on the surface while Michael Collins stayed in orbit.Roughly how long does sunlight take to reach Earth?
Answer: About 8 minutes
Light covers the 150 million kilometres in around 8 minutes and 20 seconds.What is the largest moon of Saturn?
Answer: Titan
It is the only moon in the Solar System with a thick atmosphere.Which is the nearest large spiral galaxy to the Milky Way?
Answer: Andromeda
It is about 2.5 million light-years away and visible to the naked eye on dark nights.Who was the first woman to travel into space?
Answer: Valentina Tereshkova
She flew aboard Vostok 6 in June 1963.What does a light-year measure?
Answer: Distance
It is how far light travels in one year, about 9.46 trillion kilometres.Which space telescope was launched in 1990 aboard the Space Shuttle Discovery?
Answer: The Hubble Space Telescope
It orbits Earth and has taken some of the most famous images in astronomy.What was the name of the first artificial satellite, launched in 1957?
Answer: Sputnik 1
The Soviet Union launched it on 4 October 1957, starting the Space Age.Which planet is farthest from the Sun?
Answer: Neptune
Only one spacecraft, Voyager 2, has ever flown past it, in 1989.
Hard space quiz questions
Which is the largest moon in the Solar System?
Answer: Ganymede
This moon of Jupiter is bigger than the planet Mercury.Which planet has the shortest day in the Solar System?
Answer: Jupiter
It spins once in just under 10 hours.Which spacecraft was the first to reach interstellar space?
Answer: Voyager 1
It crossed the edge of the Sun's bubble of solar wind in 2012.Who published the Sun-centred model of the Solar System in 1543?
Answer: Nicolaus Copernicus
His book appeared in the year of his death.What is the boundary of a black hole beyond which nothing can escape?
Answer: The event horizon
Not even light can get back out once it crosses this line.Phobos is a moon of which planet?
Answer: Mars
Mars has one other small moon, called Deimos.What is the tallest volcano in the Solar System?
Answer: Olympus Mons
This Martian volcano is roughly two and a half times the height of Mount Everest.On which planet is a day longer than a year?
Answer: Venus
It takes about 243 Earth days to spin once but only about 225 to orbit the Sun.Which star is the closest to the Sun?
Answer: Proxima Centauri
It is about 4.2 light-years away, part of the Alpha Centauri system.Which infrared space telescope launched on 25 December 2021?
Answer: The James Webb Space Telescope
It works about 1.5 million kilometres from Earth, far beyond the Moon.What was the name of the dog that became the first animal to orbit Earth?
Answer: Laika
She flew aboard Sputnik 2 in November 1957.Which famous comet returns to the inner Solar System about every 76 years?
Answer: Halley's Comet
Its next close pass is expected in 2061.
How to run a space quiz night
If you are using these questions in a classroom or at home, read the Easy round first so everyone gets off to a good start, then mix Medium and Hard questions for older players. For kids, turn the planet questions into a race: the first to name all eight planets in order wins a bonus point. For adults, ask teams to write their answers down and only reveal the facts at the end of each round, which keeps the debate going. Keep score in rounds of ten so latecomers can still catch up.
Play it live against a real opponent
Think you would score 37 out of 37? Prove it under pressure. The live space quiz puts you against another player on 7 questions about planets, stars, moons and missions, with 10 seconds each. Send a challenge link to a friend or a classmate, try the space pictures quiz to name planets and nebulae from real photos, or jump into Quick match to face someone new on any topic. Every match earns XP toward your Space level and moves you up the leaderboards.
FAQ
Are these space quiz questions good for kids?
Yes. The Easy round suits younger players and anyone just starting to learn about the planets. The Medium and Hard rounds use more names and dates, so they suit older children, adults and astronomy fans.
Are the answers up to date?
We only use well established facts, such as the order of the planets, famous missions and dates that will not change. Things like the number of known moons change as new ones are found, so we leave those out.
How does the live space quiz work?
Two players answer the same 7 questions with 10 seconds per question. Faster correct answers score more points, and question 7 counts double. Each match earns XP toward your Space topic level and helps you climb leagues and leaderboards.