What is the proof that the sun is a star?

Answer 1

It is hot and luminous.

It has the same spectral qualities of other stars.

It's chemical composition is the same as other stars.

It's a star - We call our star the Sun.

Answer 2

The proof that the sun is a star lies in its characteristics and behavior. Like other stars, the sun is a luminous sphere of hot gas that undergoes nuclear fusion to emit heat and light. Observations of the sun's spectrum, composition, and energy output confirm its stellar nature. Additionally, studies of other stars in the universe show that the sun shares similarities in its properties, further supporting its classification as a star.