The smallest known star has a radius of 0.12 solar radii

The smallest known stars are incredibly tiny compared to our Sun, with a radius of only 0.12 times the Sun’s radius—barely large enough to sustain nuclear fusion. These ultra-small stars sit right on the edge between true stars and brown dwarfs, the so-called “failed stars.”

Despite their small size, they can burn fuel for trillions of years, far longer than stars like our Sun. If one of these stars replaced the Sun, it would look like a dim red dot in the sky, yet its gravity would still be strong enough to hold planets in orbit.

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Видео The smallest known star has a radius of 0.12 solar radii канала Spatial Theory