The brightest star in the south is

Sirius, also known as Alpha Canis, is the brightest star in the whole day except the sun, but it is darker than Venus and Jupiter and brighter than Mars most of the time. Sirius generally refers to Sirius A, and its main system consists of a blue-white-blue dwarf and a blue-white dwarf, and its center of mass is about 8.6 ly (light years) away from the Earth.

Extended data discovery history:

1844, German astronomer Bessel inferred that Sirius is a binary star according to the wave pattern appearing in its motion path, because the star moves along a wavy trajectory in the nearby space, and thus inferred that it has a companion star with an orbital period of about 50 years.

This companion star was first seen by American astronomer A Clark in 1862 with his homemade refracting telescope. Sirius is the brightest star in the whole day, and its visual magnitude is-1.46, etc. In western constellations, it is the binary star of Canis Canis. Of course, the ancients in our country also noticed this bright star and called it "Wolf Star", which is located in the south of Queqiu and the most striking star in Su Jing. In the past, this star refers to the invading aliens, and its change of light and shade indicates the security of the frontier.

Baidu Encyclopedia-Sirius