Space & Astronomy Quiz

Explore planets, stars, galaxies and space missions including ISRO and NASA in a free space and astronomy quiz with answers.

The space and astronomy quiz explores the solar system, stars, galaxies and black holes, together with space missions from ISRO, NASA and other agencies. It is a great category for students and space enthusiasts.

How to play the Space & Astronomy Quiz

1. Sign in and start the quiz. You get 15 random questions from a bank of 100.
2. Choose one of four options for each question, or skip it and move on.
3. Use lifelines when you are stuck: Hint, 50/50, Audience poll and Change question.
4. See your score at the end and find all your results in your profile.

Sample Space & Astronomy questions with answers

1. Which planet is closest to the Sun?

   • Earth
   • Mars
   • Venus
   • Mercury

   Answer: Mercury - Mercury orbits closest to the Sun.

2. Which planet has the shortest day?

   • Mercury
   • Earth
   • Jupiter
   • Saturn

   Answer: Jupiter - Jupiter rotates in under 10 hours.

3. Roughly how long does sunlight take to reach the Earth?

   • About 1 hour
   • About 8 seconds
   • About 1 day
   • About 8 minutes

   Answer: About 8 minutes - Light travels about 150 million km in around 8 minutes 20 seconds.

4. What is the average distance between the Earth and the Sun called?

   • Parsec
   • Astronomical Unit
   • Light-second
   • Light-year

   Answer: Astronomical Unit - One astronomical unit is about 150 million km.

5. Why do we always see the same side of the Moon?

   • Earth blocks the other side
   • It does not rotate at all
   • The other side is always dark
   • It rotates once in the same time it takes to orbit Earth

   Answer: It rotates once in the same time it takes to orbit Earth - This is called synchronous (tidal) locking.

6. Who became the first Indian astronaut to visit the International Space Station, in 2025?

   • Rakesh Sharma
   • Shubhanshu Shukla
   • Angad Pratap
   • Prasanth Nair

   Answer: Shubhanshu Shukla - Group Captain Shubhanshu Shukla flew on the Axiom-4 mission in June 2025.

7. Chandrayaan-3 made India the first country to land near which region of the Moon?

   • The far side
   • The south pole
   • The equator
   • The north pole

   Answer: The south pole - India became the first nation to land near the lunar south pole.

8. Which space telescope, launched in 1990, orbits Earth and is named after an American astronomer?

   • Spitzer
   • Hubble Space Telescope
   • James Webb Space Telescope
   • Kepler

   Answer: Hubble Space Telescope - Hubble is named after Edwin Hubble.

9. Who discovered the four largest moons of Jupiter in 1610?

   • Isaac Newton
   • Galileo Galilei
   • Edwin Hubble
   • Johannes Kepler

   Answer: Galileo Galilei - Io, Europa, Ganymede and Callisto are called the Galilean moons.

10. What is the approximate age of the Solar System?

    • About 500 million years
    • About 13.8 billion years
    • About 4.6 billion years
    • About 10,000 years

    Answer: About 4.6 billion years - The Solar System formed about 4.6 billion years ago.

Frequently asked questions

How many questions are in the Space & Astronomy Quiz?

Each round has 15 multiple-choice questions picked at random from 100 Space & Astronomy questions, so every attempt is different.

Is the Space & Astronomy Quiz free?

Yes, it is free to play. Sign in to start the quiz, and your scores are saved to your Thinkmad profile.

What lifelines can I use?

When you are stuck you can ask for a hint, use 50/50 to remove two wrong answers, check the audience poll, or change the question.

Can I see the correct answers?

Yes. After you answer, the quiz shows the correct option, and your final score lists how many answers were correct, wrong or skipped.