The south star
The sun is the brightest star as seen from Earth, but that is only because it is much closer to us than any other star.
Visually Sirius is the brightest star in the nighttime sky while R136a1 is actually brightest star we know about.Remember while a star may be very bright, the further away it is the dimmer it appears. Sirius is one of the closest stars to us and therefore looks the brightest.
That is Sirius. Its "apparent magnitude" is minus1.5 approximately. Sirius is the brightest star in the sky for us on Earth, but it's not the most luminous star in "absolute magnitude". The main reason that it is so bright is just that it is very close to us.
because it is the nearest star by a long way
Beta Hydri is the brightest star in the constellation Hydrus, it is 24.4 light years from us and has an absolute magnitude of 3.43See related link for more information
The sun is the brightest star as seen from Earth, but that is only because it is much closer to us than any other star.
It is the closet star to us.
Sirius
The sun is the brightest star we see because it is much closer to us than any other star.
Visually Sirius is the brightest star in the nighttime sky while R136a1 is actually brightest star we know about.Remember while a star may be very bright, the further away it is the dimmer it appears. Sirius is one of the closest stars to us and therefore looks the brightest.
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.
Because it is the closest to us
because it is the nearest star by a long way
That is Sirius. Its "apparent magnitude" is minus1.5 approximately. Sirius is the brightest star in the sky for us on Earth, but it's not the most luminous star in "absolute magnitude". The main reason that it is so bright is just that it is very close to us.
No. The sun is a star, not a planet. It is by no means the brightest star either. It only appears so bright because it is much closer to us than any other star.
Beta Hydri is the brightest star in the constellation Hydrus, it is 24.4 light years from us and has an absolute magnitude of 3.43See related link for more information
What do you mean by "biggest"? That it looks brightest? That its real brightness is the greatest? That it has the largest diameter? The greatest mass? The star that looks brightest for us is Sirius. Planets, however, also look like stars, and some of them look brighter than Sirius, including Venus, Jupiter, and sometimes Mars.