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SCIENCE
Physical - Astronomy
Largest Stars by Diameter
This list features the largest stars ever discovered in space by diameter.
RANK | STAR | DISTANCE (light years) | DIAMETER | COMPARED TO OUR SUN |
1 | UY Scuti | 9,459 | 2.3765 billion km | 1,700x larger |
2 | VY Canis Majoris | 3,900 | 1.9758 billion km | 1,500x larger |
3 | RW Cephei | 3,500 | 2.135799 billion km | 1,530x larger |
4 | V354 Cephei | 8,900 | 1.537497 billion km | 1,520x larger |
5 | KY Cygni | 5,000 | 2.0921 billion km | 1,430x larger |
6 | Mu Cephei | 2,838 | 1.753164 billion km | 1,200x larger |
7 | VV Cephei A | 5,000 | 2.052315 billion km | 1,050x larger |
8 | KW Sagittarii | 6,200 | 1.5 billion km | 1,009x larger |
9 | Betelgeuse | 640 | 1.2 billion km | 887x larger |
10 | Antares | 550 | 835 million km | 12x larger |
References
World Atlas (n.d.) The ten biggest stars in the Milky Way. Available at: https://www.worldatlas.com/space/the-ten-biggest-stars-in-the-milky-way.html [Accessed 1 December 2025].
Science Focus (n.d.) Largest stars in the universe. Available at: https://www.sciencefocus.com/space/largest-stars-in-the-universe [Accessed 1 December 2025].
Universe Size Comparison (n.d.) List of largest stars. Available at: https://universe-size-comparison.fandom.com/wiki/List_of_largest_stars [Accessed 1 December 2025].
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