- The most extreme stars in the universe: The largest (UY Scuti; 1,700 times wider than the Sun). The most massive (RMC 136a1; 315 times solar masses). The smallest (EBLM J0555-57Ab; the size of Saturn). The hottest (WR 102; around 380,000°F on surface). The fastest (S5-HVS1; 0.6% the speed of light). https://astronomy.com/magazine/news/2020/09/the-most-extreme-stars-in-the-universe 10 comments space
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