How much do you know about space?

Annette

Image: Shutterstock

About This Quiz

Are you a future astronomer? This quiz will test your mettle. There's so much to know when it comes to space. It's so vast that it's unfathomable! We're going to test your basic knowledge of the heavens, and we promise that when you're done, you won't be able to come back down to Earth!

How many planets are in our solar system?

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. No Pluto!!!!

How many other planets are out there?

There are billions of other planets out there in the cosmos. Just think of the possibilities!

Which is true about being in space?

You actually get taller in space, because gravity isn't weighing you down!

How much does a space suit cost?

One space suit costs $11 million dollars! And it wasn't even designed by Prada!

What's the current estimate of how old our galaxy is?

Estimates vary, but that is quite a long time!

How long is one day on Mercury?

One Mercury day lasts for nearly 59 days of Earth time! That's a long day.

What would happen if you fell into a black hole?

You would literally stretch like spaghetti. That would hurt!

What creates our high and low tides?

Gravity from the sun and moon - especially the moon - create the high and low tides. Cool!

Who said, “That’s one small step for a man, one giant leap for mankind"?

Neil Armstrong said these famous words when he was the first man to walk on the moon. There has been debate as to whether Armstrong said "for a man" or "for man."

What's the largest moon in the solar system?

Ganymede, Jupiter's moon, is the largest in our solar system.

When's the next time we'll see Halley's comet?

It comes around about every 75 years. Put it on your calendar.

What is Saturn mostly made of?

The planet is not solid, but almost entirely made of gas. It's a gas giant, in fact.

Which planet has the most rings?

Saturn has the most rings, made of rock and ice. Some chunks are the size of large buildings!

Which of these is true about being in space?

Your feet actually peel when in space, because you're not using them to walk. The callouses fall off, leaving baby-soft skin!

How many Earths can you fit inside the sun?

You can actually fit 1.3 million Earths inside the sun! That's pretty crazy.

What does the word "astronaut" mean in Greek?

It translates into "star sailor." That's a pretty awesome title.

What was true about the first crew that went to the moon?

Brave and smart, but no life insurance? It was prohibitively expensive. To make up for it, they signed tons of envelope autographs while in quarantine, which a friend later postmarked on important dates, so their families could sell them if things went wrong.

What is the name of the program that analyzes radio signals, listening for signs of intelligent life in space?

SETI is looking for aliens! They haven't found any yet.

Which is true about the universe?

According to Einstein's theory of relativity, the universe is bending in a curve.

Who first said that the sun is the center of our solar system?

The astronomer Copernicus was the first to state that the Earth goes round the sun, and not the other way around!

Which is true about International Space Station toilets?

Yep, that's pretty much everything that you need to know about space toilets.

The gases that formed the Earth's atmosphere came from where?

Exploding volcanoes supplied the gases that formed the Earth's atmosphere. Thank you, volcanoes!

What is the sun's life expectancy?

That's right - 10 billion years. It's about halfway through its life!

What was the first living creature to orbit the Earth?

The dog known as Laika was sent up to space and he orbited the Earth, but sadly, he died. He will always be remembered.

What is the Great Red Spot​ on Jupiter's surface?

That is a twisting, gaseous anticyclone - sort of like a giant hurricane. Nothing about that sounds like a good time.

What does "nebula" mean in Latin?

Nebula means "mist" or "cloud" in Latin. Cosmic clouds are known as nebulae.

How many other galaxies are in space?

That's right; there are more than a trillion other galaxies out there! Wow.

What are the brightest objects in the universe?

Quasars are bits of matter that are pulled into a black hole and they glow brightly! That's the only upside to being pulled into a black hole.

What is a sidereal day?

A sidereal day is about four minutes shorter than a regular Earth day. It's the time our planet takes to rotate on its axis, relative to distant stars.

Why do comets have tails?

As a comet nears the sun, the exterior melts from the heat. There are actually two tails - one gas, and one made of dust particles.

Why is the inside faceplate of a space helmet sprayed before use?

The surface is sprayed with an anti-fog compound in order to keep the visor from misting. Seems pretty crucial.

The very furthest galaxies are doing what?

The very furthest galaxies are expanding outward. The universe is getting bigger!

What is the name for the brightest star in each constellation?

The alpha star is the brightest, and the beta star is second.

How many artificial satellites are launched into space each year?

There are a lot of satellites up there! How do they not crash into each other?

Why is Pluto no longer classified as a planet?

In 2006, Pluto was reclassified as a dwarf planet because it is too small to clear debris from its own orbit. That's one of the requirements of planet-ness.

About HowStuffWorks Play

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!

Explore More Quizzes