A lower number means more brightness. All of these are apparent magnitudes. If you mean intrinsic magnitude, the answers are somewhat different. Sirius and Alpha Centauri A are bright because they're close to us. Canopus, on the other hand, is much brighter, but also much further away (Sirius is about 8 light years away; Canopus is more than 300 light years away).
Off subject:
Some planets are brighter (in apparent magnitude) than stars; for example, when Venus appears in the sky, she is always the brightest object (after the Sun and the Moon). In fact, Venus is bright enough to be seen in the broad daylight, if you know where to look. Planets look like stars, but their movement between the stars can be detected if you observe them just for a few nights.
The brightest star in the constellation Hercules is Kornephoros, which has a white color.
Sirius is the brightest star in the night sky, but the brightest overall is the sun.
Rigel is the brightest star in Orion, Betelgeuse is the 2nd brightest
No, Sirius is the brightest star in the night sky. Rigel is one of the brightest stars in the constellation of Orion.
The brightest star in Orion is Rigel.
sun is the brightest star in the galaxy
The brightest star in the constellation Hercules is Kornephoros, which has a white color.
the blue giant is the brightest star
The brightest star in Ursa Major is a star called Alioth.
Sirius is the brightest star in the night sky, but the brightest overall is the sun.
No. The brightest star in the night sky is Sirius.
No. Blue stars are generally the brightest.
Rigel is the brightest star in Orion, Betelgeuse is the 2nd brightest
Rigel is the brightest star in Orion and the sixth brightest star in the sky, with an apparent magnitude of 0.18.
The brightest star as seen from Earth is the sun. The brightest star in the night sky is Sirius.
No, Sirius is the brightest star in the night sky. Rigel is one of the brightest stars in the constellation of Orion.
It is a descriptive adjective. Such as in this sentence: That star is the brightest star I have ever seen.