Space Facts: How Big? How Far?

Space is vast — bigger, farther, and more mysterious than we can easily imagine! Just how large is the Sun compared to the Earth? How far away are the nearest stars? What’s the size of our galaxy? Astronomy is full of fascinating numbers and comparisons that can really stretch your mind. In this quiz, you’ll explore fun facts about size, distance, and scale in the universe. You don’t need to be an astronomer — these are questions that can surprise and delight anyone who has ever looked up at the night sky and wondered what’s out there. Ready to test your cosmic knowledge and get a new sense of just how BIG space really is? Let’s launch into it!
No. 1 /10
How many Earths could fit inside the Sun?

About 1 million
About 10,000
About 100
About 5 million
No. 2 /10
How far is the Moon from Earth on average?

About 384,000 km
About 100,000 km
About 1 million km
About 10,000 km
No. 3 /10
What is the largest planet in our solar system?

Jupiter
Saturn
Earth
Neptune
No. 4 /10
Which is larger: the Sun or the Earth?

The Sun
The Earth
They are about the same
It depends on the time of year
No. 5 /10
How long does light take to travel from the Sun to Earth?

About 8 minutes
About 1 second
About 1 hour
About 24 hours
No. 6 /10
Which is the smallest planet in the solar system?

Mercury
Mars
Venus
Earth
No. 7 /10
How many stars are in the Milky Way galaxy (estimated)?

About 100–400 billion
About 1 billion
About 10 million
About 10 trillion
No. 8 /10
How far is the nearest star system (Alpha Centauri)?

About 4.37 light-years
About 1 light-year
About 10 light-years
About 100 light-years
No. 9 /10
What is the approximate diameter of the Earth?

About 12,742 km
About 5,000 km
About 20,000 km
About 50,000 km
No. 10 /10
Which planet is known for its rings?

Saturn
Jupiter
Neptune
Venus
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