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Largest Objects in the Solar System

With the help of a map, try to name the 35 largest objects in the Solar System by radius.
Source: Wikipedia
Map is not to scale.
Some objects are not well photographed, so their appearance is estimated.
Quiz by QuantumMechanist
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Featured Quiz
Last updated: June 20, 2022
More quiz info >>
First submittedJune 21, 2020
Times taken51,034
Average score48.6%
Rating4.98
Quiz and answer stats >>
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Type
Mean Radius (km)
Answer
Star
696,342
Sun
Planet
69,911
Jupiter
Planet
58,232
Saturn
Planet
25,362
Uranus
Planet
24,622
Neptune
Planet
6,371
Earth
Planet
6,051.8
Venus
Planet
3,389.5
Mars
Jovian satellite
2,634.1
Ganymede
Saturnian satellite
2,574.4
Titan
Planet
2,439.7
Mercury
Jovian satellite
2,410.3
Callisto
Jovian satellite
1,821.6
Io
Terran satellite
1,737.4
Moon
Jovian satellite
1,560.8
Europa
Neptunian satellite
1,353.4
Triton
Dwarf planet
1,188.3
Pluto
Dwarf planet
1,163
Eris
Type
Mean Radius (km)
Answer
Uranian satellite
788.4
Titania
Dwarf planet
780 (ellipsoid)
Haumea
Saturnian satellite
763.8
Rhea
Uranian satellite
761.4
Oberon
Saturnian satellite
734.5
Iapetus
Dwarf planet
715
Makemake
Dwarf planet?
~615
Gonggong
Plutonian satellite
606
Charon
Uranian satellite
584.7
Umbriel
Uranian satellite
578.9
Ariel
Saturnian satellite
561.4
Dione
Cubewano
560.5
Quaoar
Saturnian satellite
531.1
Tethys
Sednoid
~498
Sedna
Dwarf planet
469.7
Ceres
Plutino
~458
Orcus
Cubewano
~423
Salacia
TheLetter4
+26
Level 69
Jun 21, 2020
nice
QuantumMechanist
+9
Level 69
Jun 21, 2020
thanks!
TheLetter4
+11
Level 69
Jun 21, 2020
yeah dude this is truly impressive
OrcJuggernaut
+4
Level 20
Nov 15, 2020
Well Done :)
Nilles
+14
Level 49
Jun 21, 2020
Absolutely stunning! I didn't know it was possible to make a better quiz that your "Name the strictly convex deltahedra" quiz but you came awfully close my friend! Keep it up
QuantumMechanist
+2
Level 69
Jun 21, 2020
I'm glad to see that I've retained some quiz takers! Thanks!
xxz
+4
Level 22
Nov 8, 2020
this and "name the strictly convex deltahedra" are some of, if not the, best quizzes on this website
Pandora49
+9
Level 55
Jun 21, 2020
Great map!!!
QuantumMechanist
+3
Level 69
Jun 21, 2020
Thank you!
BotswanaEmperor
+10
Level 61
Jun 21, 2020
This map is stunning! Great work!
QuantumMechanist
+2
Level 69
Jun 21, 2020
Thank you!
Pandora49
+10
Level 55
Jun 21, 2020
Great map!!! (I know I said this before but I MUST say it again)
QuantumMechanist
+4
Level 69
Jun 21, 2020
Thank you again, kind quizzer.
Stewart
+11
Level 68
Jun 21, 2020
This quiz is truly wonderful. It's so amazing to see the SVG Update having big effects on the community already, all thanks to people like you :)
QuantumMechanist
+3
Level 69
Jun 21, 2020
Thank you Stewart! It's an honor.
KingEureka
+4
Level 63
Jun 21, 2020
A very very good quiz. Great to see other astronomy fans out there! I would suggest you to reduce the time by 3 minutes, because it is too easy right now.
QuantumMechanist
+2
Level 69
Jun 22, 2020
Can do! Thanks for the feedback.
dug28
+6
Level 79
Jun 21, 2020
This is amazing. I'm going to make my kids take this. Super fun and effective learning tool. Thanks for making it!
QuantumMechanist
+2
Level 69
Jun 22, 2020
Thank you very much!
Nikhaz
+6
Level 74
Jun 22, 2020
Phenomenal work of art, one of the best SVGs I’ve seen on this site!
QuantumMechanist
+2
Level 69
Jun 22, 2020
Thanks!
GeoPhilia
+4
Level 57
Jul 1, 2020
Fantastic Map! Nominated this quiz!
QuantumMechanist
+2
Level 69
Jul 2, 2020
Thanks!
Raz07
+4
Level 57
Aug 4, 2020
Great quiz, congrats on your first feature!!
QuantumMechanist
+2
Level 69
Aug 4, 2020
Thank You! It is an honor.
brainchild
+4
Level 71
Aug 4, 2020
Beautiful Quiz! 🪐
QuantumMechanist
+1
Level 69
Aug 4, 2020
Thank you very much!
Confabulously
+24
Level 75
Aug 4, 2020
I think this quiz is missing the celestial body of Your Mom.
QuantumMechanist
+12
Level 69
Aug 4, 2020
You're right! I'll have that fixed immediately.
AlphaBetaGamma
+1
Level 27
Dec 11, 2020
True
NigelS
+3
Level 92
Aug 4, 2020
Great quiz!
QuantumMechanist
+1
Level 69
Aug 4, 2020
Thank you very much!
GeoPhilia
+2
Level 57
Aug 4, 2020
Congratulations on getting it featured!
QuantumMechanist
+2
Level 69
Aug 4, 2020
Thanks! It's exciting!
KingEureka
+6
Level 63
Aug 4, 2020
I really really really hate to point it out, but it annoys me that Iceland is Missing. Congrats for the Feature!
QuantumMechanist
+3
Level 69
Aug 4, 2020
Shoot, I'll have that fixed immediately
MarieDS
+1
Level 59
Jun 30, 2021
I mean, so is the Sinai peninsula but it does say that the map is not drawn to scale. So I just assumed that those pieces of land are very very small in the map and thus unable to be seen at the distance pictured. Quiz maker's prerogative.
sumguy
+3
Level 82
Aug 4, 2020
Saturn, Uranus, Neptune, and Pluto are given away by the "Type" column (and, to a lesser extent, Earth and Jupiter). You might just as well give the planets and make it the largest objects other than planets.
QuantumMechanist
+10
Level 69
Aug 5, 2020
This quiz isn't meant to be especially difficult. I'm making the assumption that people who don't know the planets probably aren't going to get it from that column, but even if they do I don't think it's that bad. The planets don't seem to be the competitive part, given that all of them are typed in by ~98% of the quiz takers, but there are plenty of other more challenging answers that fewer people get. Thank you for the suggestion.
kalbahamut
+4
Level 84
Aug 5, 2020
Are we sure that Titan is not a large tennis ball?
QuantumMechanist
+3
Level 69
Aug 5, 2020
No one can say for sure
bonk
+4
Level 72
Aug 5, 2020
This map is really nice! Good job on it!
QuantumMechanist
+1
Level 69
Aug 5, 2020
Thank you!
tbolt
+2
Level 73
Aug 5, 2020
5 Stars
QuantumMechanist
+1
Level 69
Aug 5, 2020
Thanks!
FadKrashmor
+4
Level 68
Aug 7, 2020
Oh dear, I have, some time ago, taken the Open University course "Moons of the Solar System" - thoroughly recommended incidentally - and failed to name more than one of Saturn's moons.
QuantumMechanist
+3
Level 69
Aug 7, 2020
It's been around a month since I first made this quiz. I took it yesterday and only got two points' worth.
UG332
+4
Level 66
Aug 9, 2020
Whoa, great job mate. This is so insanely detailed :)
QuantumMechanist
+1
Level 69
Aug 9, 2020
Thank you!
Yeoryios
+3
Level 71
Aug 9, 2020
I forgot Mars...

100% got Mars......

QuantumMechanist
+3
Level 69
Aug 9, 2020
Congrats! You're in the zeroth percentile!
ChineseChen
+6
Level 63
Aug 10, 2020
I just killed everyone in the Solar System by missing the sun.
Serval
+1
Level 39
Mar 25, 2021
you think that's bad? I forgot the sun...
maple
+3
Level 52
Aug 9, 2020
Unfortunately I forgot of Ceres :(
methiony
+2
Level 28
Aug 19, 2020
vv nice quizz i love it <3333 great workkk
QuantumMechanist
+1
Level 69
Aug 20, 2020
Thanks!
Dontforget
+1
Level 55
Aug 22, 2020
Ahaha the moon is guessed more than the sun apparently
QuantumMechanist
+7
Level 69
Aug 23, 2020
The sun obviously can't be in space because when you see it there aren't any stars around!
GrammarBeane1
+5
Level 74
Sep 3, 2020
I really appreciate how most moons are named after figures in Greek/Roman mythology, but then Uranus' moons are Shakespeare characters XD
Sibawayh
+6
Level 48
Sep 3, 2020
Why can't they name a moon Dave or Bill or something simple I can actually remember?
Regtheledge1000
+1
Level 31
Sep 3, 2020
Could you maybe accept “Chiron” for “Charon?
Relox84
+3
Level 69
Dec 29, 2020
That's just not the same thing
aloepottt
+1
Level 36
Jun 7, 2021
it was a joke.
MrBubbles
+4
Level 61
Sep 3, 2020
I feel dumb. I got Iapetus but not Ceres.
kenpo17
+4
Level 66
Sep 3, 2020
I tried "your mom" as an answer but it wasn't accepted. Missed opportunity.
Sibawayh
+1
Level 48
Sep 3, 2020
gotem
FolgoreCZ
+1
Level 61
Sep 5, 2020
Should'use "yo mama." Probably just not enough type-ins. ;-)
driehoek25
+1
Level 64
Sep 3, 2020
I almost missed the sun.
FootballFan22
+2
Level 33
Sep 9, 2020
No way I didn't type in Sun
NotGoodAtCombat
+2
Level 21
Sep 10, 2020
Nice quiz! I got 23/35, almost missed mercury which would've been embarrassing
DiscoBayGolfer
+2
Level 78
Sep 16, 2020
To say this is impressive is an understatement...awesome job.
QuantumMechanist
+1
Level 69
Sep 16, 2020
Thanks!
undeadwarrior
+2
Level 61
Nov 18, 2020
Hilariously, I forgot Earth.
QuantumMechanist
+3
Level 69
Nov 18, 2020
To be fair, when we think of space we generally think of things outside Earth.
Hampus
+1
Level 58
Dec 9, 2020
You should accept Helios, Tellus, Luna...
QuantumMechanist
+3
Level 69
Dec 9, 2020
The quiz already accepts Luna. I've never heard any English speaker refer to the Sun in Greek and the Earth in Latin.
EcceHomo
+2
Level 74
Mar 23, 2021
Gaea then, :). Fabulous quiz QM. I must learn them all. But am I able to do it....??
Pandora49
+1
Level 55
Dec 26, 2020
99% get Saturn but only 98% get Earth. Humans are weird!
negreaves
+2
Level 28
Dec 29, 2020
when you remember that the sun exists after taking the quiz...
MyNameWasTaken
+3
Level 48
Apr 20, 2021
WTF is Gonggong and why am I laughing so hard right now
QuantumMechanist
+3
Level 69
Apr 21, 2021
Haha yeah this one made me laugh too. Gonggong is a water god in Chinese mythology. The International Astronomical Union's criteria for naming objects like Gonggong is that is must be named after a mythological figure pertaining to creation. Gonggong happened to be associated with water, ice, and the color red, which fit all the criteria. For a time after discovery before it was found to be red and when it just had a numerical name, its nickname was Snow White.
PauloMX
+2
Level 65
Apr 22, 2021
Remember Bruno Mars!
nathanvdb
+3
Level 37
Aug 17, 2021
When you see that 8% of quiz takers dont know that the sun is called the sun :/
axkv2509
+4
Level 59
Sep 2, 2021
It cracks me up that there’s a dwarf planet called Makemake!
5708skier
+2
Level 35
Jul 14, 2022
It's pronounced mah-kay-mah-kay but yeah it's still funny.
andywave
+3
Level 61
Feb 23, 2022
Missed the sun, lmao
nate06sherb
+2
Level 29
Jun 8, 2022
How did I get Quaoar but not Io
Findlay
+2
Level 82
Jun 16, 2022
I was wondering who the 8% of people who didn't get the sun in a quiz about objects in the SOLAR system were, but all of the confessions in the comment section more or less answer that one for me.
sumguy
+1
Level 82
Jun 19, 2022
When you talk things that are "in" the Solar System, you're thinking of things that are gravitationally bound by the Sun (Sol). The Sun is more than "in" the Solar System, it kind of is the Solar System, in that there is no Solar System without Sol.
QuizApe
+3
Level 57
Jun 17, 2022
It scares me that 8% named all of the planets but not the Sun
SaveOurPlanet
+2
Level 24
Jun 19, 2022
Where did you get the map?
QuantumMechanist
+1
Level 69
Jun 19, 2022
I made it in Inkscape. Feel free to use it!
sumguy
+2
Level 82
Jun 19, 2022
Why are Haumea and Makemake listed as "Dwarf planet?" with a question mark? Haumea was declared a dwarf planet by the IAU on September 17, 2008, and Makemake was declared a dwarf planet on July 11, 2008.
QuantumMechanist
+1
Level 69
Jun 20, 2022
Hi,

Dwarf planet designation is in a weird place where several bodies are stuck being called a dwarf planet by one group of people and something else by another group, so I had a hard time figuring out the specifics.

It looks like you're right though, so I'll have that fixed.

Gamerboyscored
+2
Level 20
Sep 27, 2022
1:59 100%
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