50 Solar System Quiz Questions and Answers (+ 1 Picture Round)

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Are you ready to embark on a celestial adventure? This is the ultimate solar system quiz with answers designed to transport you to the depths of our universe and beyond.

With questions about the solar system, from our neighbouring planets to distant galaxies, prepare to test your knowledge and learn some fun facts along the way!

Kick off your journey with round 1, featuring easy planet trivia questions that delve into the planets in our Solar System, the importance of gravity, and some cool features of celestial bodies like Saturn’s stunning rings. This round is the perfect starting point for your exploration.

In round 2, you’ll encounter multiple-choice solar system quiz questions that will take you on an exciting trip from Earth to the outer edges of our Solar System. Learn about space probes, Galilean moons, the sun’s composition, and the former Soviet space stations!

Round 3 shakes things up with a ‘True or False’ segment. Are we still discovering new moons in the 2020s? Is Mercury tidally locked to the sun? Get ready to dispel misconceptions and verify truths.

In round 4, the journey continues with medium-level trivia, where you’ll learn about the Kuiper Belt, the unique features of Saturn, and the intriguing Giant Impact Hypothesis related to the Moon’s formation.

Finally, brace yourself for round 5, the ultimate challenge! This round delves into the harder aspects of our solar system, exploring dwarf planets, the life cycle of the sun, and the interesting spin of Venus on its axis.

So, are you ready to reach for the stars? Get set for this exciting solar system quiz with answers and let your interstellar journey begin!

Round 1: Easy Solar System Trivia Questions

1. How many planets are there in the Solar System?
2. What force keeps the planets orbiting the sun?
3. Which planet is known for its marvellous rings made of commits, asteroids, ice and fragments of broken moons?
4. What is the closest planet to the sun?
5. What planet comes closest to Earth during its orbit?
6. Which planet in the Solar System has the most moons?
7. Who was the first human to walk on the moon?
8. Our Solar System is part of which galaxy?
9. What kind of  astronomical object is Pluto?
10. Which planet is named after the Roman God of the Ocean?

Round 1: Easy Solar System Trivia Questions and Answers

Here are the 10 easy solar system questions with answers.

1. How many planets are there in the Solar System? 8
2. What force keeps the planets orbiting the sun? Gravity
3. Which planet is known for its marvellous rings made of commits, asteroids, ice and fragments of broken moons? Saturn
4. What is the closest planet to the sun? Mercury
5. What planet comes closest to Earth during its orbit? Venus
6. Which planet in the Solar System has the most moons? Jupiter
7. Who was the first human to walk on the moon? Neil Armstrong
8. Our Solar System is part of which galaxy? The Milky Way
9. What kind of  astronomical object is Pluto? Dwarf Planet
10. Which planet is named after the Roman God of the Ocean? Neptune

Round 2: Solar System Multiple Choice Questions

1. The Earth is approximately how many miles from the sun?
   1. 53 million
   2. 73 million
   3. 93 million
   4. 113 million 
2. What was the first space probe to leave the Solar System?
   1. The Hubble Telescope
   2. Voyage 1
   3. Voyager 2
   4. Halley Armada
3. Which of the following is not one of the Galilean moons?
   1. Ganymede
   2. Io
   3. Amalthea
   4. Europa
4. The sun is primarily composed of which gas?
   1. Hydrogen
   2. Helium
   3. Nitrogen
   4. Argon
5. Nereid, Triton and Larissa are all moons orbiting which planet?
   1. Mars
   2. Jupiter
   3. Saturn
   4. Neptune
6. Which of the following planets does not have an o-zone?
   1. Mercury
   2. Earth
   3. Venus
   4. Mars
7. Jupiter’s Giant Red Spot is an area of persistently high…
   1. Temperatures
   2. Pressures
   3. Winds
   4. All of the above
8. A year on Neptune is approximately how many years on Earth?
   1. 65
   2. 165
   3. 265
   4. 365
9. Salyut, Almaz and Mir are all….
   1. Comets visible from Earth
   2. Moons of Jupiter
   3. Cosmonauts who’ve orbited the Earth
   4. Former Soviet space stations
10. How long would a one-way mission from Earth to Mars take?
    1. 9 days
    2. 9 weeks
    3. 9 months
    4. 9 years

Round 2: Solar System Multiple Choice Questions and Answers

1. The Earth is approximately how many miles from the sun? C. 93 million 
2. What was the first space probe to leave the Solar System? B. Voyager 1
3. Which of the following is not one of the Galilean moons? C. Amalthea
4. The sun is primarily composed of which gas? A. Hydrogen
5. Nereid, Triton and Larissa are all moons orbiting which planet? D. Neptune
6. Which of the following planets does not have an o-zone? A. Mercury
7. Jupiter’s Giant Red Spot is an area of persistently high… d. All of the above
8. A year on Neptune is approximately how many years on Earth? B. 165
9. Salyut, Almaz and Mir are all…. D. Former Soviet space stations
10. How long would a one-way mission from Earth to Mars take? C. 9 months

Round 3: Solar System Quiz – True or False

1. Earth is the fifth largest planet in the Solar System.
2. Mercury is the hottest planet in the Solar System.
3. We are still discovering new moons in our Solar System in the 2020s.
4. Venus, Mars and Uranus are the only planets in the Solar System without moons.
5. Jupiter has the largest liquid ocean in the Solar System.
6. Saturn is the windiest planet in the Solar System, with wind speeds of up to 1600 kilometres per hour.
7. The International Space Station orbits Earth once every 9 days.
8. The atmosphere of Mars is 95% composed of carbon dioxide.
9. Mercury is tidally locked to the sun, so it has a dark side and a light side just like the moon.
10. There are over 8000 artificial satellites orbiting Earth.

Round 3: Solar System Quiz Answers- True or False

1. Earth is the fifth largest planet in the Solar System. True
2. Mercury is the hottest planet in the Solar System. False, Venus is the hottest planet.
3. We are still discovering new moons in our Solar System in the 2020s. True.
4. Venus, Mars and Uranus are the only planets in the Solar System without moons. False, Uranus has 27 moons
5. Jupiter has the largest liquid ocean in the Solar System. True.
6. Saturn is the windiest planet in the Solar System, with wind speeds of up to 1600 kilometres per hour. True
7. The International Space Station orbits Earth once every 9 days. False, it orbits once every 90 minutes
8. The atmosphere of Mars is 95% composed of carbon dioxide. False
9. Mercury is tidally locked to the sun, so it has a dark side and a light side just like the moon. False
10. There are over 8000 artificial satellites orbiting Earth. True.

Round 4: Medium Solar System Trivia Questions

1. What is the largest dwarf planet in the Solar System?
2. What is the least dense planet in the Solar System?
3. What is the only moon in our Solar System to have a dense atmosphere and the only other known object in the Solar System to have a water system?
4. How many planets are there in the Inner Solar System?
5. What is the name of the donut-shaped ring of icy objects at the outer edge of our Solar System?
6. Which planet has an average surface temperature of -60 degrees celsius, or -81 degrees fahrenheit?
7. What is the biggest moon in the Solar System?
8. The Giant Impact Hypothesis is the most widely accepted theory about the formation of which astrological object?
9. Which planet rotates the slowest on its axis?
10. Which comet enters the inner Solar System every 76 years, with its last visit taking place in 1986?

Round 4: Medium Solar System Trivia Questions and Answers

1. What is the largest dwarf planet in the Solar System? Pluto
2. What is the least dense planet in the Solar System? Saturn
3. What is the only moon in our Solar System to have a dense atmosphere and the only other known object in the Solar System to have a water system? Titan 
4. How many planets are there in the Inner Solar System? Four
5. What is the name of the donut-shaped ring of icy objects at the outer edge of our Solar System? Kuiper Belt
6. Which planet has an average surface temperature of -60 degrees celsius, or -81 degrees fahrenheit? Mars
7. What is the biggest moon in the Solar System? Ganymede
8. The Giant Impact Hypothesis is the most widely accepted theory about the formation of which astrological object? The Moon 
9. Which planet rotates the slowest on its axis? Venus
10. Which comet enters the inner Solar System every 76 years, with its last visit taking place in 1986? Halley’s Comet

Round 5: Hard Solar System Trivia Questions

1. What is the second largest dwarf planet in the Solar System?
2. What stage is the sun at in its life cycle?
3. What is the name of the outermost atmospheric layer of the sun which forms the boundary between the Solar System and Interstellar Space?
4. Which planet has 25 hour days?
5. How many space agencies take part in the maintenance of the International Space Station?
6. What is the only planet in the Solar System to spin clockwise on its access?
7. How many moons in the Solar System are bigger than Mercury?
8. Which planet was discovered by William Herschel in 1781?
9. Which dwarf planet is named after the creator god from Easter Island mythology?
10. Which moon is also known as Jupiter IV?

Round 5: Hard Solar System Trivia Questions and Answers

Here are all the hard questions about the solar system with answers.

1. What is the second largest dwarf planet in the Solar System? Eris
2. What stage is the sun at in its life cycle? Main Sequence
3. What is the name of the outermost atmospheric layer of the sun which forms the boundary between the Solar System and Interstellar Space? The Heliosphere
4. Which planet has 25 hour days? Mars
5. How many space agencies take part in the maintenance of the International Space Station? Five
6. What is the only planet in the Solar System to spin clockwise on its access? Venus
7. How many moons in the Solar System are bigger than Mercury? Two
8. Which planet was discovered by William Herschel in 1781? Uranus 
9. Which dwarf planet is named after the creator god from Easter Island mythology? Makemake
10. Which moon is also known as Jupiter IV? Callisto

Round 6: Solar System Picture Round Answers

Round 6: Solar System Picture Round Answers

1. Earth
2. Jupiter
3. Uranus
4. Mars
5. Venus
6. Neptune
7. Saturn
8. Mercury

If you’ve enjoyed these solar system quiz questions and answers, make sure to check out other quizzes about science and the Earth.

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