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SCIENCE
Physical - Astronomy
Largest Moons by Diameter
This list features the largest moons in our solar system by diameter.
RANK | MOON | PLANET | DIAMETER |
1 | Ganymede | Jupiter | 3,275 miles (5,270 km) |
2 | Titan | Saturn | 3,200 miles (5,150 km) |
3 | Callisto | Jupiter | 2,995 miles (4,820 km) |
4 | Io | Jupiter | 2,264 miles (3,643 km) |
5 | Moon | Earth | 2,159 miles (3,475 km) |
6 | Europa | Jupiter | 1,940 miles (3,122 km) |
7 | Triton | Neptune | 1,682 miles (2,707 km) |
8 | Titania | Uranus | 980 miles (1,578 km) |
9 | Rhea | Saturn | 950 miles (1,529 km) |
10 | Oberon | Uranus | 946 miles (1,523 km) |
References
World Atlas (n.d.) Biggest moons in our solar system. Available at: https://www.worldatlas.com/space/biggest-moons-in-our-solar-system.html [Accessed 1 December 2025].
Fandom (n.d.) List of natural satellites by size. Available at: https://thesolarsystem.fandom.com/wiki/List_of_natural_satellites_by_size [Accessed 1 December 2025].
Ridpath, I. (n.d.) Moons. Available at: http://www.ianridpath.com/moons.html [Accessed 1 December 2025].
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