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Solar System Objects by Size, In Order

List the 35 largest objects in the Solar System by size (mean radius), from largest to smallest.
Hints are given for the category of object
Source: Wikipedia (https://en.wikipedia.org/wiki/List_of_Solar_System_objects_by_size)
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JacobHanson28
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Last updated: May 19, 2026
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First submittedMay 19, 2026
Times taken6
Average score51.4%
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Rank
Category
Mean Radius (km)
Answer
1
Star
695,700
Sun
2
Planet
69,886
Jupiter
3
Planet
58,232
Saturn
4
Planet
25,362
Uranus
5
Planet
24,622
Neptune
6
Planet
6,371
Earth
7
Planet
6,051
Venus
8
Planet
3,389
Mars
9
Moon
2,634
Ganymede
10
Moon
2,574
Titan
11
Planet
2,439
Mercury
12
Moon
2,410
Callisto
13
Moon
1,821
Io
14
Moon
1,737
The Moon
15
Moon
1,560
Europa
16
Moon
1,353
Triton
17
Dwarf Planet
1,188
Pluto
18
Dwarf Planet
1,163
Eris
Rank
Category
Mean Radius (km)
Answer
19
Moon
788
Titania
20
Dwarf Planet
780
Haumea
21
Moon
763
Rhea
22
Moon
761
Oberon
23
Moon
734
Iapetus
24
Dwarf Planet
715
Makemake
25
Dwarf Planet
615
Gonggong
26
Moon
606
Charon
27
Moon
584
Umbriel
28
Moon
578
Ariel
29
Moon
561
Dione
30
Dwarf Planet
548
Quaoar
31
Moon
531
Tethys
32
Dwarf Planet
469
Ceres
33
Dwarf Planet
455
Orcus
34
Dwarf Planet
453
Sedna
35
Possible Dwarf Planet
419
Salacia
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