Solar System Trivia

Can you guess these facts about the Solar System in which we reside?

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Last updated: February 5, 2022

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First submitted	February 5, 2022
Times taken	42,092
Average score	55.0%
Rating	4.95

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Hint	Answer
Planet which is closest to the Sun	Mercury
Gas that composes 96% of Venus's thick atmosphere, creating a runaway greenhouse effect?	Carbon dioxide
"Belt" which appears between the orbits of Mars and Jupiter	The asteroid belt
The largest object in that belt, named for the Roman goddess of agriculture	Ceres
Name one of the four largest moons of Jupiter	Ganymede \| Callisto \| Europa \| Io
Pluto is this type of planet	Dwarf planet
"Belt" which appears beyond the orbit of Neptune and is home to the above	Kuiper Belt
To the nearest whole number, the mass of the sun as a percent of the mass of the entire solar system	100%
Galaxy in which our Solar System is located	Milky Way
Term for a model of the Solar System which places the sun at the center	Heliocentric
Term which refers to the distance between the Earth and the Sun	Astronomical Unit
Martian volcano that is nearly three times higher than Mount Everest	Olympus Mons
Giant storm that has been visible on the surface of Jupiter since at least 1878	Great Red Spot
Comet that appears in the inner solar system every 75–76 years	Halley's Comet
What became, in 2012, the first human-built probe to exit the solar system	Voyager 1
Nearest star to the sun	Proxima Centauri
Gas that composes 89% of the volume of Jupiter	Hydrogen
Shape that mysteriously appears on the north pole of Saturn	Hexagon
Comet that slammed into Jupiter in 1994 with the force of 6 trillion tons of TNT	Shoemaker–Levy
Crystallized carbon substance that scientists think might rain from the sky on Jupiter, Saturn, Uranus, and Neptune	Diamonds

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37 Comments

Level 85

Feb 6, 2022

Cool quiz!

Level 92

Feb 7, 2022

Ugh kuiper not kuyper. I tried everything but the correct spelling

Level 66

Feb 7, 2022

I tried Shumaker... (D'OH)

Level 48

Feb 16, 2022

Better than my attempt with Schumacher!

Level 51

Jun 16, 2025

I tried cuiper and then just gave up! Hehe not very smart of me

Level 59

Feb 7, 2022

I tried red dot, big red dot, great red dot... but not spot!

Level 74

Feb 7, 2022

Tried all shapes up to pentagon...

Level 75

Feb 13, 2022

Do you work under the DoD by any chance?

Level 58

May 6, 2023

space quizzes are easy because im a space nerd.

Level 80

Feb 16, 2022

I never heard of that one, either, but eventually got it guessing random shapes.

Level 73

Feb 8, 2022

I also thought it was Kuyper! So close.

Level 61

Feb 16, 2022

18/20, way better than I thought I'd do! :D

Level 76

Feb 16, 2022

Nitpick: Dwarf planets are not a type of planet, but in fact a wholly separate category.

From Wikipedia: "In 2006 the concept was adopted by the International Astronomical Union (IAU) as a category of sub-planetary objects, part of a three-way recategorization of bodies orbiting the Sun: planets, dwarf planets and small Solar System bodies. […] Since 2006 the IAU and perhaps the majority of astronomers have excluded them from the roster of planets." https://en.wikipedia.org/wiki/Dwarf_planet

Level 74

Feb 16, 2022

So disappointed the comet wasn't Eugene-Levy

Level 55

Feb 16, 2022

I tried both eugene and dan for Jupiter's comet...neither were right for some reason...

Level 95

Feb 16, 2022

At times I wish I could send Daniel crashing into Jupiter... #COYS

+15

Level 80

Feb 16, 2022

Pretty easy. Lived in this solar system all my life.

Level 75

Feb 17, 2022

Too solar-centric.

Level 80

Feb 19, 2022

Don't you mean heliocentric?

Level 69

Feb 16, 2022

Hmmm...what's the scientific name for the Great Red Spot?

Level 67

Feb 16, 2022

Great Red Spot

Level 57

Feb 16, 2022

I remember Halley's comet from like 5th/6th grade. It was such a big deal at the time. But for all these years I thought it was Hailey's comet. Lol I guess I learned something today!

Level 46

Jun 12, 2023

I'm glad I wasn't the only one who thought that.

Level 65

Feb 16, 2022

Got 19 but couldn’t remember the _____-Levy one. Tried joke answers like Marv and Chandra. Obviously both incorrect.

Level 71

Feb 20, 2022

Too heliocentric.

Level 23

Feb 21, 2023

H2 should be a valid answer for Hydrogen :)

I mean, CO2 already is for Carbon Dyoxide

Level 55

Mar 19, 2024

I got 100% first try, I am a nerd in fact

Level 63

Apr 8, 2024

How is it possible that the average score is 11? That's concerningly low.

Level 58

Apr 12, 2024

When I put the "The asteroid belt" it is not coming up as valid answer - what's up with that? Seems to be an error in your system. Asteroid does not come up either.

Level ∞

Apr 12, 2024

Sorry about that. Forgot to ignore the "the". Asteroid would have worked though.

Level 68

Apr 12, 2024

I should know more about the asteroid belt and the outer planets. But with today's economy, who can afford to travel?

Level 62

Apr 12, 2024

Didn't one or both Pioneers leave the Solar System before either Voyager?

Level ∞

Apr 12, 2024

Instead of asking, why not look it up?

Level 44

Apr 15, 2024

I kept writing red dot, not red spot

Level 49

Apr 17, 2024

Tried Demeter about 6 times to see if I was having a stroke. I realized eventually.

Level 71

Apr 17, 2024

Interesting fact: in Greece, cereals are called dimithriaka!

Level 55

Nov 7, 2025

Not to be too pedantic but Voyager 1, in a lot of peoples opinion hasn't left the solar system. It's left the heliosphere, certainly.

There is a debate in the astronomy community whether the size of the solar system is defined by the heliopause or of the oort cloud.