Question

Why is the Sun different from other stars in the universe?

Answer 1

Sun is an average star. Some stars like Betelgeuse is 1000 times bigger.
Others like proxima centurai is only 12% mass of Sun..

Explanation:

stars are classified as per spectra/ temperature. Sun is G2 type star

It is a yellow star Blue stars are very hot and have surface temperature about 20,000 to 50,000 degree and. brown dwarfs have temperature less than 2500 degree c.
Sun is now its main sequence. It is about 4.6 billion years old.
Surface temperature of Sun is 5800 degree C.