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Part of Scales of the Universe.
AMNH/D. Finnin
If the Hayden Sphere is the size of the blue supergiant star Rigel, then this model is the relative size of the Sun.
Our Sun is a star of intermediate size, mass, and luminosity (light output). In its old age, the Sun will swell more than a hundredfold to become a red giant that is larger than the star Rigel.