Because its the only star in our solar system
the sun is. It is also the ONLY star in THIS solar system.
Because it is the largest star in our solar system.
The sun is a star, not a planet, though it is the largest object in the solar system.
The sun is the largest object and the only star in the solar system.
the sun.the sun is the star of our solar system
There is only one star in 'your' solar system - the Sun.
believe it or not it is
there is only one star in our solar system, and that is the sun.
The Sun is, so far as we can determine, the ONLY star in the solar system. If it's not the only one, it's certainly the largest. (Look up "Nemesis" for some thoughts on why it might not be the only one.)
Jupiter is the largest planet in our solar system. The Sun is not a planet; it's a star.
Smallest or largest, there is only one star in our Solar System - The Sun.
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.