because it is the closest to the earth
sun is the closest star to earth .
The sun is the brightest star we see because it is much closer to us than any other star.
It is the closet star to us.
The brightest star would be the Sun. See related question.
Because it is the closest to us
The brightest star is the Sun. See related question.
The Sun
because it is the nearest star by a long way
Sirius the Dog Star is the brightest star. However, there are other objects that are brighter. they are Venus (Morning/Evening Star ) and the Moon.
sun is the brightest star in the galaxy
Our Sun is the closest star to Earth, therefore, the brightest.
Sirius is the brightest star in the night sky, but the brightest overall is the sun.