How the Sun’s Size Compares to Other Stars!

In The vastness of the cosmos, our Sun is just a speck. Need proof? In this image, it’s barely visible.

Though massive by Earthly standards—capable of holding about 1.3 million Earths—the Sun is quite modest compared to the true giants of the universe.

Stars like Sirius and Pollux begin to dwarf it, with Sirius being nearly twice as large and Pollux measuring nine times wider. Arcturus takes it further, stretching 25 times the Sun’s size and shining 170 times brighter. And that’s just the beginning.

Then come the supergiants. Rigel, a blue supergiant, spans 79 times the Sun’s width. Betelgeuse, a red supergiant, is about 700 times larger, while Antares surpasses even that at around 883 times the Sun’s size. If one of these titans replaced the Sun, it would engulf everything out to Jupiter’s orbit. But the true behemoth? Stephenson 2-18, the largest known star, is over 2,150 times the size of our Sun—a staggering reminder of how minuscule our solar system is in the grand scale of the universe.

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Learn more: https://spaceplace.nasa.gov/sun-compare/en/