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SCIENCE
Physical - Astronomy
Largest Galaxies by Diameter
This list features the largest known galaxies in space by diameter.
RANK | GALAXY | DIAMETER (light years) | DIAMETER (miles) |
1 | IC 1101 | 4 million | 23.5 quintillion miles |
2 | Hercules A | 1.5 million | 8.8 trillion miles |
3 | A2261-BCG | 1 million | 5.88 trillion miles |
4 | ESO 306-17 | 1 million | 5.88 trillion miles |
5 | Comet Galaxy | 600,000 | 3.53 trillion miles |
6 | Condor Galaxy | 522,000 | 3.09 trillion miles |
7 | UGC 2885 | 463,000 | 2.76 trillion miles |
8 | ESO 444-46 | 400,000 | 2.37 trillion miles |
9 | Tadpole Galaxy | 280,000 | 1.65 trillion miles |
10 | Andromeda Galaxy | 200,000 | 1.18 quintillion miles |
References
World Atlas (n.d.) ‘The Ten Largest Galaxies in the Universe’. Available at: https://www.worldatlas.com/space/the-ten-largest-galaxies-in-the-universe.html [Accessed 1 December 2025].
Astra Space Universe (n.d.) ‘10 Largest Galaxies in the Universe’. Available at: https://www.astraspaceuniverse.com/post/10-largest-galaxies-in-the-universe [Accessed 1 December 2025].
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