The sun is quite an ordinary star, some what smaller than the average visible stars.
It has a diameter of 864,000 miles, a surface temperature of 6,000° C. which increases to an estimated 20,000,000° at the core. It looks like a simple ball of hot matter but actually it is a complicated engine of energy production. It shines so steadily that to laymen it seems changeless.
Actually it was another sort of star in the distant past and it will be still another sort of star in the distant future.
Latest and most informing biography of the star that sustains all life of earth...