No, the sun is not part of a multiple star system, except to the extent that it is one of the many stars in the Milky Way Galaxy.
A binary star system.
the sun is the only star in our solar system. It is close to us, relatively speaking, so looks bigger. Other stars you see belong to other solar systems.
the sun is. It is also the ONLY star in THIS solar system.
Our sun is actually a small star, tons of stars are way bigger than our sun. One. Each star is a sun.
I'm not 100% sure what you mean by this but usually star systems are classed as single (Just one star), binary (meaning two stars orbiting each other), triple (three stars orbiting each other), etc... As our Sun is the only star in this system it is a single star system and therefore none of the others.
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.
class G
medium-sized star.
The only star in the solar system is the sun.
A star found in our solar system is the Sun. The Sun is a star.
There is only one star in the solar system - it is the Sun.
The sun is the first and only star in the solar system.