Brightness is defined as the luminousity as seen from Earth. So the brightest star is the Sun.
HD 93129A is a blue supergiant and one of the most luminous stars in the Milky Way and is 5,500,000 times more luminous than the Sun.
Pistol star is about 300-340 times larger than our sun . This star is a blue hyper giant, located approximately 25000 light years away from earth in the direction of Sagittarius (near galactic center) .
There are many stars hotter than our Sun. for example Vega and Sirius
Giants like Pollux, Arcturus, and Aldebaran.
Arcturus is bigger than the sun.
A supergiant
That's called a supernova.
aldebaran
Good, a nice question with a definite answer. The magnitude1 star is 2.512 times brighter (near enough).
While Pollux is actually brighter than Sirius, Sirius appears brighter because it is several times closer.
Contenders are:- LBV 1806-20 - ~ 5,000,000 times brighter than the Sun. Pistol Star - ~ 1,000,000 times brighter than the Sun (Variable) Cygnus OB2-12 ~ 6,000,000 times brighter than the Sun HD 93129A ~ 5,500,000 times brighter than the Sun. Eta Carnae ~ 5,000,000 times brighter than the Sun.
Brightness is related to distance. However, from the same distance, an O class star is much much brighter than a M class star. As a comparison, an O class star would appear about 100,000 times brighter than our Sun, whereas a M class star could appear 0.0017 dimmer than our Sun, if the Sun was replaced with each star.
Absolutely. When speaking of the brightness you see from earth, you are speaking of apparent magnitude. When considering the type of star, it's composition, stage, age, size, distance, etc., a star is also assigned an absolute magnitude, so the ranking of the star if seen from similar distances reveals the truth about a star. 3.26 light years away is the assumed distance in ranking stars. A star many times farther away than a second star may appear much brighter than the second star which is much closer, based partially on the various factors mentioned above. The lower the value for a magnitude, the brighter, or more correctly, the more luminous, a star. Thus, a 3.4 is brighter than a 5.1, for example. Long ago the scale was originally an arbitrary ranking based on certain stars that were considered to be the brightest. Since then, stars even brighter have been identified, thus the need to use values even less than zero. Only a handful of stars fall below zero in apparent magnitude. So then it is not significant where in the sky (in what constellation) a star lies, the magnitude value determines the brightness.
a Supergiant
super-giant star
A nova or supernova.
In absolute terms, some are brighter than our Sun - in some rare cases, millions of times brighter - while others are much less bright than our Sun.
It is four times as brighter. It is four times as brighter.
A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.A magnitude 1 star is 100 times brighter than a magnitude 6 star.
Good, a nice question with a definite answer. The magnitude1 star is 2.512 times brighter (near enough).
2 magnitudes brighter means it's about 2.512 x 2.512 times brighter. So that's about 6.31 times brighter.
While Pollux is actually brighter than Sirius, Sirius appears brighter because it is several times closer.
Contenders are:- LBV 1806-20 - ~ 5,000,000 times brighter than the Sun. Pistol Star - ~ 1,000,000 times brighter than the Sun (Variable) Cygnus OB2-12 ~ 6,000,000 times brighter than the Sun HD 93129A ~ 5,500,000 times brighter than the Sun. Eta Carnae ~ 5,000,000 times brighter than the Sun.
The Sextopia star
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