Easy Space Quiz Questions for Kids (with Answers)
Use this printable quiz list for classroom warm-ups, car trips, or revision. Tap any question to reveal the answer and a short explanation — then play the full space quiz online with hints and stars.
Questions & answers
Tap a question to reveal the answer. 35 questions below.
1. What is the star at the centre of our solar system?Show answer
- The Moon
- The Sun — correct
- Jupiter
- Mars
The Sun is a star — a giant ball of hot gas that provides light and heat to all the planets!
☀️ The Sun is so big that about one million Earths could fit inside it!
2. Which planet do we live on?Show answer
- Mars
- Venus
- Earth — correct
- Mercury
Earth is the third planet from the Sun and the only one we know of with life!
🌍 About 71% of Earth's surface is covered by oceans!
3. What does Earth orbit?Show answer
- The Moon
- The Sun — correct
- Jupiter
- The Milky Way
Earth travels around the Sun once every year — that journey is called an orbit!
🌍 Earth moves around the Sun at about 107,000 kilometres per hour!
4. What orbits around Earth?Show answer
- The Sun
- Mars
- The Moon — correct
- Venus
The Moon is Earth's natural satellite — it orbits us about once every 27 days!
🌙 The Moon is slowly moving away from Earth by about 3.8 centimetres per year!
5. How many planets are in our solar system?Show answer
- 7
- 8 — correct
- 9
- 10
There are eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune!
🪐 Jupiter is so massive that it has more than twice the mass of all the other planets combined!
6. Which planet is known as the Red Planet?Show answer
- Venus
- Mars — correct
- Jupiter
- Mercury
Mars looks red because its surface is covered in iron-rich dust that has rusted over billions of years!
🔴 A day on Mars is almost the same length as a day on Earth — about 24 hours and 37 minutes!
7. What is the largest planet in our solar system?Show answer
- Saturn
- Neptune
- Jupiter — correct
- Uranus
Jupiter is the biggest planet — it is a gas giant made mostly of hydrogen and helium!
🪐 Jupiter has at least 95 known moons — four of them are as big as small planets!
8. Which planet is famous for its beautiful rings?Show answer
- Jupiter
- Uranus
- Saturn — correct
- Neptune
Saturn's rings are made of countless chunks of ice and rock orbiting the planet!
💍 Saturn's rings are incredibly thin — in some places they are only about 10 metres thick!
9. The Sun is a star.Show answer
Answer: True
The Sun is a star — specifically a medium-sized yellow dwarf star!
⭐ The Sun is about 4.6 billion years old and is roughly halfway through its life!
10. Astronauts float inside the International Space Station because there is no gravity in space.Show answer
Answer: False
Gravity is still very strong in low Earth orbit — astronauts float because they and the station are constantly falling around Earth together!
🛰️ Astronauts in orbit experience about 90% of the gravity we feel on Earth's surface!
11. Which planet is closest to the Sun?Show answer
- Venus
- Mercury — correct
- Mars
- Earth
Mercury is the innermost planet — it orbits the Sun in just 88 Earth days!
🌡️ On Mercury, daytime temperatures can reach 430°C while nights drop to −180°C!
12. What do we call a person who travels into space?Show answer
- Pilot
- Astronaut — correct
- Scientist
- Engineer
Astronauts are specially trained to live and work in space — Russia calls them cosmonauts!
👨🚀 Astronauts grow about 5 centimetres taller in space because their spines stretch without gravity!
13. What galaxy is our solar system part of?Show answer
- Andromeda
- The Milky Way — correct
- Whirlpool
- Sombrero
The Milky Way is our home galaxy — a huge spiral of stars, gas, and dust!
🌌 The Milky Way is about 100,000 light-years across — light takes 100,000 years to cross it!
14. Pluto is still considered one of the eight planets.Show answer
Answer: False
Pluto was reclassified as a dwarf planet in 2006 because it has not cleared other objects from its orbit!
❄️ Pluto has a heart-shaped glacier of nitrogen ice on its surface called Tombaugh Regio!
15. What vehicle is used to launch people and satellites into space?Show answer
- Submarine
- Rocket — correct
- Helicopter
- Hot air balloon
Rockets use powerful engines to push against the ground and escape Earth's gravity!
🚀 The Saturn V rocket that took astronauts to the Moon was as tall as a 36-storey building!
16. What causes the Moon to appear as different shapes in the sky?Show answer
- The Moon changes shape
- Clouds cover parts of it
- Different amounts of sunlit side are visible — correct
- The Moon moves closer and farther
The Moon always stays round — we see phases because different amounts of its sunlit side face Earth as it orbits us!
🌓 The same side of the Moon always faces Earth because it rotates once for every orbit!
17. The International Space Station orbits Earth.Show answer
Answer: True
The ISS orbits Earth at about 400 kilometres altitude, completing roughly 16 orbits per day!
🛰️ The ISS has been continuously occupied by astronauts since November 2000!
18. Which planet is known for being extremely hot and cloudy?Show answer
- Mercury
- Venus — correct
- Mars
- Jupiter
Venus is hotter than Mercury even though Mercury is closer to the Sun — its thick atmosphere traps heat!
🌡️ Venus surface temperature is about 465°C — hot enough to melt lead!
19. What is a shooting star really?Show answer
- A dying star
- A meteor — correct
- A comet
- A planet
A shooting star is a meteor — a small rock from space that burns up as it streaks through Earth's atmosphere!
☄️ Most meteors are no bigger than a grain of sand — they just move incredibly fast!
20. What do astronauts wear to survive in space?Show answer
- Wetsuit
- Spacesuit — correct
- Raincoat
- Lab coat
A spacesuit provides air, pressure, temperature control, and protection from radiation and micrometeoroids!
👨🚀 A modern NASA spacesuit costs about 12 million dollars and weighs about 127 kilograms on Earth!
21. Stars look like they twinkle because of Earth's atmosphere.Show answer
Answer: True
Stars twinkle because Earth's atmosphere bends starlight slightly as air moves — planets usually do not twinkle much!
✨ From space, where there is no atmosphere, stars shine steadily without twinkling!
22. Which force keeps planets in orbit around the Sun?Show answer
- Magnetism
- Gravity — correct
- Electricity
- Friction
Gravity is the force of attraction between masses — the Sun's huge mass pulls planets into curved orbits!
🍎 Gravity on the Moon is only about one-sixth as strong as on Earth — you could jump six times higher!
23. What is the name of NASA's famous Mars rover that landed in 2021?Show answer
- Spirit
- Opportunity
- Perseverance — correct
- Sojourner
Perseverance landed in Jezero Crater in February 2021 to study Mars and collect rock samples!
🚗 Perseverance carried a small helicopter named Ingenuity — the first aircraft to fly on another planet!
24. The Moon produces its own light.Show answer
Answer: False
The Moon has no light of its own — it shines because it reflects sunlight back to Earth!
🌙 The Moon reflects only about 12% of the sunlight that hits it — it is actually quite dark!
25. How long does it take Earth to orbit the Sun once?Show answer
- One day
- One month
- One year — correct
- One week
Earth takes about 365.25 days to complete one orbit around the Sun — that is one year!
📅 Every four years we add an extra day on 29 February to account for the extra quarter day!
26. Which planet spins on its side compared to the others?Show answer
- Neptune
- Uranus — correct
- Saturn
- Mars
Uranus rotates on its side — probably because a massive collision knocked it over billions of years ago!
💙 Uranus was the first planet discovered with a telescope — William Herschel found it in 1781!
27. What is a comet mostly made of?Show answer
- Metal only
- Ice and dust — correct
- Liquid water
- Pure fire
Comets are icy bodies — when they approach the Sun, ice vaporises and creates a glowing tail!
☄️ Halley's Comet returns to the inner solar system roughly every 76 years — it was last seen in 1986!
28. There is no sound in space because there is no air to carry it.Show answer
Answer: True
Sound travels as vibrations through matter — in the vacuum of space there is almost nothing for sound waves to travel through!
🔇 Astronauts on spacewalks use radio headsets to talk because their voices cannot travel through the vacuum!
29. Who was the first human to walk on the Moon?Show answer
- Yuri Gagarin
- Neil Armstrong — correct
- Buzz Aldrin
- John Glenn
Neil Armstrong became the first person to step on the Moon on 20 July 1969, followed minutes later by Buzz Aldrin!
🌙 Armstrong and Aldrin spent about two and a half hours walking on the Moon while Michael Collins orbited above!
30. What is the hottest layer of the Sun that we can see from Earth?Show answer
- Core
- Photosphere — correct
- Corona
- Magnetosphere
The photosphere is the Sun's visible surface — the bright layer we see when we look at the Sun!
☀️ Never look directly at the Sun without proper eye protection — it can permanently damage your eyes!
31. Jupiter is a rocky planet like Earth.Show answer
Answer: False
Jupiter is a gas giant — it has no solid surface and is made mostly of hydrogen and helium gases!
🪐 Jupiter's Great Red Spot is a giant storm that has been raging for at least 400 years!
32. What causes day and night on Earth?Show answer
- The Moon blocking the Sun
- Earth rotating — correct
- Earth moving closer to the Sun
- Clouds
Earth spins once every 24 hours — the side facing the Sun has daytime and the other side has night!
🌍 Earth rotates at about 1,670 kilometres per hour at the equator — but you do not feel it because everything moves together!
33. What is a black hole?Show answer
- A dark planet
- A region of extreme gravity — correct
- An empty part of space
- A dead star that glows
A black hole is a place where gravity is so intense that nothing — not even light — can escape once it crosses the event horizon!
🕳️ The first image of a black hole was captured in 2019 by the Event Horizon Telescope!
34. Which space telescope was launched in 1990 and helped discover galaxies far away?Show answer
- James Webb
- Hubble — correct
- Kepler
- Chandra
The Hubble Space Telescope has taken stunning images of distant galaxies, nebulae, and planets for over three decades!
🔭 Hubble orbits Earth at about 540 kilometres up and travels at 28,000 kilometres per hour!
35. Mars has two small moons.Show answer
Answer: True
Mars has two small moons called Phobos and Deimos — they are probably captured asteroids!
🌙 Phobos orbits so close to Mars that it will crash into the planet in about 50 million years!
Easy Space Quiz Questions for Kids (with Answers)