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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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Last updated: November 15, 2023
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First submittedJune 21, 2020
Times taken84,945
Average score45.7%
Rating4.99
5:00
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Type
Mean Radius (km)
Answer
Star
695,508
Sun
Planet
69,911
Jupiter
Planet
58,232
Saturn
Planet
25,362
Uranus
Planet
24,622
Neptune
Planet
6,371.0
Earth
Planet
6,051.8
Venus
Planet
3,389.5
Mars
Jovian satellite
2,634.1
Ganymede
Saturnian satellite
2,574.7
Titan
Planet
2,439.4
Mercury
Jovian satellite
2,410.3
Callisto
Jovian satellite
1,821.6
Io
Terran satellite
1,737.5
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
788.9
Titania
Dwarf planet
780 (ellipsoid)
Haumea
Saturnian satellite
763.8
Rhea
Uranian satellite
761.4
Oberon
Saturnian satellite
735.6
Iapetus
Dwarf planet
715
Makemake
Dwarf planet?
~615
Gonggong
Plutonian satellite
606.0
Charon
Uranian satellite
584.7
Umbriel
Uranian satellite
578.9
Ariel
Saturnian satellite
561.7
Dione
Cubewano
543
Quaoar
Saturnian satellite
533.0
Tethys
Sednoid
~498
Sedna
Dwarf planet
469.7
Ceres
Plutino
~455
Orcus
Cubewano
~423
Salacia
+12
Level 55
Jun 21, 2020
Great map!!!
+4
Level 71
Jun 21, 2020
Thank you!
+14
Level 68
Jun 21, 2020
This map is stunning! Great work!
+3
Level 71
Jun 21, 2020
Thank you!
+14
Level 55
Jun 21, 2020
Great map!!! (I know I said this before but I MUST say it again)
+5
Level 71
Jun 21, 2020
Thank you again, kind quizzer.
+14
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 :)
+3
Level 71
Jun 21, 2020
Thank you Stewart! It's an honor.
+5
Level 62
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.
+2
Level 71
Jun 22, 2020
Can do! Thanks for the feedback.
+7
Level 84
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!
+2
Level 71
Jun 22, 2020
Thank you very much!
+7
Level 75
Jun 22, 2020
Phenomenal work of art, one of the best SVGs I’ve seen on this site!
+2
Level 71
Jun 22, 2020
Thanks!
+5
Level 56
Jul 1, 2020
Fantastic Map! Nominated this quiz!
+3
Level 71
Jul 2, 2020
Thanks!
+5
Level 56
Aug 4, 2020
Great quiz, congrats on your first feature!!
+3
Level 71
Aug 4, 2020
Thank You! It is an honor.
+5
Level 69
Aug 4, 2020
Beautiful Quiz! 🪐
+1
Level 71
Aug 4, 2020
Thank you very much!
+36
Level 78
Aug 4, 2020
I think this quiz is missing the celestial body of Your Mom.
+18
Level 71
Aug 4, 2020
You're right! I'll have that fixed immediately.
+1
Level 26
Dec 11, 2020
True
+4
Level 95
Aug 4, 2020
Great quiz!
+1
Level 71
Aug 4, 2020
Thank you very much!
+3
Level 56
Aug 4, 2020
Congratulations on getting it featured!
+2
Level 71
Aug 4, 2020
Thanks! It's exciting!
+12
Level 62
Aug 4, 2020
I really really really hate to point it out, but it annoys me that Iceland is Missing. Congrats for the Feature!
+4
Level 71
Aug 4, 2020
Shoot, I'll have that fixed immediately
+1
Level 60
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.
+3
Level 84
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.
+11
Level 71
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.
+4
Level 82
Aug 5, 2020
Are we sure that Titan is not a large tennis ball?
+3
Level 71
Aug 5, 2020
No one can say for sure
+4
Level 75
Aug 5, 2020
This map is really nice! Good job on it!
+1
Level 71
Aug 5, 2020
Thank you!
+3
Level 76
Aug 5, 2020
5 Stars
+1
Level 71
Aug 5, 2020
Thanks!
+4
Level 72
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.
+3
Level 71
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.
+4
Level 68
Aug 9, 2020
Whoa, great job mate. This is so insanely detailed :)
+1
Level 71
Aug 9, 2020
Thank you!
+4
Level 73
Aug 9, 2020
I forgot Mars...

100% got Mars......

+5
Level 71
Aug 9, 2020
Congrats! You're in the zeroth percentile!
+8
Level 66
Aug 10, 2020
I just killed everyone in the Solar System by missing the sun.
+2
Level 37
Mar 25, 2021
you think that's bad? I forgot the sun...
+3
Level 53
Aug 9, 2020
Unfortunately I forgot of Ceres :(
+2
Level 28
Aug 19, 2020
vv nice quizz i love it <3333 great workkk
+1
Level 71
Aug 20, 2020
Thanks!
+1
Level 59
Aug 22, 2020
Ahaha the moon is guessed more than the sun apparently
+8
Level 71
Aug 23, 2020
The sun obviously can't be in space because when you see it there aren't any stars around!
+5
Level 82
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
+6
Level 46
Sep 3, 2020
Why can't they name a moon Dave or Bill or something simple I can actually remember?
+1
Level 29
Sep 3, 2020
Could you maybe accept “Chiron” for “Charon?
+4
Level 70
Dec 29, 2020
+1
Level 48
Jun 7, 2021
it was a joke.
+1
Level 88
Dec 26, 2023
Was it, though?
+4
Level 66
Sep 3, 2020
I feel dumb. I got Iapetus but not Ceres.
+4
Level 66
Sep 3, 2020
I tried "your mom" as an answer but it wasn't accepted. Missed opportunity.
+1
Level 46
Sep 3, 2020
gotem
+1
Level 60
Sep 5, 2020
Should'use "yo mama." Probably just not enough type-ins. ;-)
+1
Level 66
Sep 3, 2020
I almost missed the sun.
+2
Level 55
Sep 9, 2020
No way I didn't type in Sun
+2
Level 28
Sep 10, 2020
Nice quiz! I got 23/35, almost missed mercury which would've been embarrassing
+2
Level 79
Sep 16, 2020
To say this is impressive is an understatement...awesome job.
+1
Level 71
Sep 16, 2020
Thanks!
+2
Level 63
Nov 18, 2020
Hilariously, I forgot Earth.
+4
Level 71
Nov 18, 2020
To be fair, when we think of space we generally think of things outside Earth.
+1
Level 57
Dec 9, 2020
You should accept Helios, Tellus, Luna...
+3
Level 71
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.
+2
Level 78
Mar 23, 2021
Gaea then, :). Fabulous quiz QM. I must learn them all. But am I able to do it....??
+2
Level 28
Dec 29, 2020
when you remember that the sun exists after taking the quiz...
+4
Level 46
Apr 20, 2021
WTF is Gonggong and why am I laughing so hard right now
+4
Level 71
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.
+3
Level 66
Apr 22, 2021
Remember Bruno Mars!
+3
Level 44
Aug 17, 2021
When you see that 8% of quiz takers dont know that the sun is called the sun :/
+5
Level 59
Sep 2, 2021
It cracks me up that there’s a dwarf planet called Makemake!
+2
Level 48
Jul 14, 2022
It's pronounced mah-kay-mah-kay but yeah it's still funny.
+3
Level 60
Feb 23, 2022
Missed the sun, lmao
+2
Level 45
Jun 8, 2022
How did I get Quaoar but not Io
+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.
+1
Level 84
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.
+3
Level 67
Jun 17, 2022
It scares me that 8% named all of the planets but not the Sun
+2
Level 50
Jun 19, 2022
Where did you get the map?
+2
Level 71
Jun 19, 2022
I made it in Inkscape. Feel free to use it!
+2
Level 84
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.
+1
Level 71
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.

+2
Level 29
Sep 27, 2022
1:59 100%
+1
Level 33
Nov 5, 2022
8% of people forgot the sun XD
+1
Level 60
Feb 25, 2023
Even funnier 1% forgot the earth.
+2
Level 20
Feb 14, 2023
to the 2% of people that caused a meteor shower that ended the Earth. . .

well done for forgetting Jupiter :)

+2
Level 60
Feb 25, 2023
got 4 points of this surprisingly.
+2
Level 33
Mar 2, 2023
great quiz mate

especially i just (under exaggeration) got into astronomy.

+2
Level 33
Mar 10, 2023
Grreat quiz!

now make biggest stars or something :D

+2
Level 71
Mar 10, 2023
Haha, I'd have a fun time making it but I don't think anyone would like that cause most of the answers would be RSGC1-F04.
+3
Level 43
May 29, 2023
i kept on tying diome just to realise its dione
+2
Level 56
Nov 15, 2023
Thank you 13 Planets for well.. 13 of the answers!
+2
Level 76
Dec 25, 2023
Love Senda.
+1
Level 71
Dec 25, 2023
Me too.
+2
Level 72
Dec 26, 2023
Only 92% of takers guessed the sun? Hoo boy...
+2
Level 61
Jan 29, 2024
lol i tried cerberus for ceres