Explain that your sun is not the star in your solar system?

Answer 1

That would be difficult to explain.

-- The Sun IS a star.

-- It IS in my solar system.

-- It's the ONLY star in my solar system.

-- So the sun is THE star in my solar system.

Answer 2

The Sun is indeed the star at the center of our solar system, around which all the planets orbit. It provides light, heat, and energy to sustain life on Earth.