How Much Do You Know About Space? We Dare You!

Updated: Jan 13

Space quiz time! What better way to start off a new, exciting year than with some must-know facts about space? Alright! We had a hunch you’d be on board. So hop on our rocket ship to virtual exploration.

The birth of the Universe, planets, stars, satellites, astronauts, and much more awaits in this fun post. See how much you know about space and if you don’t know...don’t sweat it. Learn it.

Here’s how this is going to work. Read each question and the clue in the first paragraph. Then, on a piece of paper or on your computer write down your answer. Once you have it written, read the full text and check if you were right. You earn 1 point for each correct answer.

That’s it. Your space quiz training is complete. Ready to launch?!

How old is the Universe?

Hopefully, you’re thinking about a big number. Nope, bigger than big. Because the Universe is pretty old. Actually, it’s so old that you’d go broke if you tried to buy candles for its birthday cake.


According to researchers, the Universe is 13.7 billion years old. That means that the Universe is older than you, your parents, your grandparents, your grand-grand-parents, and your grand-grand-grand parents put together. Actually, older than your entire family tree members’ ages combined. Can you imagine?

Now, if you don’t know the story of the birth of the Universe, stick around. We’re preparing a post that will cover 13.8 billion years of space history (yeap, it will take a while).

What is the cosmic address of Earth?

Imagine you’d meet an alien and you’d become best friends. Naturally, you’d want to play together. So a time would come when you’d like to invite your alien friend over to your house.

But do you know the cosmic address? The cosmic address includes more than your street, city, country coordinates. It should include your planet, system, and galaxy.


Earth’s cosmic address is The Solar System, Orion Arm, The Milky Way, Local Group, Virgo Cluster, Virgo Super-Cluster, Universe. Quite a lot to remember, right? Even if you got just three of these right (Solar System, Milky Way, Universe), that’s awesome!

Soon we’ll learn together about clusters and super-clusters, so you’ll understand the full cosmic address of Earth.

Is the Sun a star or a planet?

Now this one should be simple. Or are you doubting your instincts? If you are, think about the main differences between stars and planets.

First of all, stars produce their own light, while planets cannot. Secondly, stars are made up of light elements, while planets are made of a combination of solids and gases. Thirdly, stars are way bigger than planets.

Can you guess now?


Earth is….drum roll, please…a start. To be more specific, the Sun is a yellow dwarf star. The Sun emits its own light, it is mostly made of hydrogen (light gas) and is the biggest object in our Solar System (the name gave that away).

Can you name, in order, the planets of the Solar System?

Our Solar System is made up of eight official planets. You already know one of them, as you live on it, so it shouldn’t be that hard to name the other seven.

But can you do it in order? And can you include even the ninth unofficial planet?

Here’s a hint: My Very Educated Mother Just Served Us Noodles. Get it?


The Solar System planets, from closest to farthest to the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. And, of course, the ninth on which one scientists are still debating whether or not to include: Pluto.

The above sentence (My Very Educated Mother Just Served Us Noodles) is a way for you to easily remember the first letter of the planets, in order. So, if you find it hard to memorize the planets’ order, keep that sentence in mind — because who doesn’t like noodles?!

Which was the first artificial satellite successfully launched in space?

If you’ve been hitching along our junior astronaut journey, this answer should come in a second. We’ve talked about satellites and the difference between natural and artificial satellites just at the end of last year.

We’ve even dedicated a full story to the first artificial satellite. Can you remember?


The first artificial satellite was Sputnik. Yes, the USSR got ahead of the US and in 1957 successfully launched the first-ever artificial satellite.

Who was the first astronaut in space?

You probably know who the first astronaut who stepped on the Moon was. But do you know who was the first in space? A little hint, he’s from the same country that successfully launched the first artificial satellite.


The first astronaut in space was Yuri Gagarin, from the USSR. On 12th of April, 1961, onboard Vostok 1, he orbited the Earth. The total duration of the flight took 108 minutes, but it advanced us years in the future!

How much do astronauts grow in space?

As odd as it might sound, astronauts get taller in space, due to microgravity.

Researches have known this strange fact for a while. However, they are only now starting to study how the height boost is actually happening. We’ll let you know as soon as they find out.

Until then, can you guess the average size of the height boost?


An astronaut in space can grow on average 2 inches (5 centimetres) taller. However, as soon as they return to Earth, astronauts slowly begin to get back to their normal height.

So, how much do you know about space?

Hope you've had fun with our space quiz. How many points did you get?

Since sharing is caring, leave your score in the comments section! And remember, it doesn’t matter how much you knew, it matters that you keep on learning.

If you’re curious for more, check out our fantastic junior astronaut programs and follow our blog for more exciting space stories.

See you soon! (we know your cosmic address)

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