THIRD PLANET FROM THE SUN.?

I am the biggest star in the solar system. I am in the center of the solar system. I am yellow.
Who am I?

I am the nearest planet of the sun.
Who am I?

I’m a icy gas giant, I’m the farthest planet from the sun.

I’m a gas giant.
Titan is my biggest moon.

I have two moons.
My mountains are the biggest in our solar system.
Who am I?

I’m the fifth planet from the sun.
I’m the largest planet in the solar system after the sun.
Who am I?

I’m the brightest planet.
I have thousand of craters
Who am I?

Extremely cold temperatures, 8th planet from the sun.
Who am I?