What is the brightest star in the constellation Sagittarius?

The brightest star in the constellation Sagittarius is Epsilon Sagittarii, also known as Kaus Australis. This star shines prominently in the night sky, making it easily identifiable among the stars of Sagittarius. Epsilon Sagittarii exhibits a magnitude of around 1.79, which places it among the more luminous stars visible from Earth.

The significance of Epsilon Sagittarii extends beyond its brightness; it is positioned at the "bow" of the archer shape that characterizes the Sagittarius constellation, contributing to the overall identifying features of this celestial grouping. In contrast to the other choices listed, which refer to stars from different constellations, Epsilon Sagittarii is exclusively associated with Sagittarius, reinforcing its status as the brightest star in that constellation.