Because it is the closest to us
sun is the brightest star in the galaxy
sun is the closest star to earth .
It is the closet star to us.
The sun is moving at an amazing speed. It is the biggest brightest star in the galaxy.
because it is the closest to the earth
As the question specifies brightness, the brightest star in the Universe is our Sun - because it is the closest star to us. The most luminous star is another question: See related question.
The sun appears the brightest in the sky because it is the closest star to Earth, approximately 93 million miles away. Its proximity combined with its luminosity makes it the brightest object in our sky.
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.
The sun is the brightest star we see because it is much closer to us than any other star.
The brightest star would be the Sun. See related question.
The brightest star as seen from Earth is the sun. The brightest star in the night sky is Sirius.