I'm not sure exactly what detail you want, but here's a start.
Rigel is a triple star system. The main star of the three is a very luminous star.
It is a blue supergiant star.
It's surface temperature is around 11,000 Kelvin.
Absolute magnitude. Rigel is much brighter than Sirius, but it's also much, much further away. So to us here on Earth, Sirius appears brighter.
Rigel was formed the same way any other star is formed, by the gravitational collapse of a large cloud of interstellar gas.
Rigel or (β Ori / β Orionis / Beta Orionis)
Its absolute magnitude is -7.92
Sirius has less absolute magnitude than Rigel. Sirius is smaller and less luminous than Rigel, but much closer to us, so Sirius appears brighter. Sirius, in fact, is the brightest star in our sky (with the exception of our own star, the sun.) Rigel is still pretty bright, but many times farther away from us than Sirius.
In terms of size from smallest to largest, its Sirius, Pollux, Aldebaran, Rigel, Betelgeuse, Antares, and KY Cygni.
Yes
I'm not too sure what other people think. I know that the Sun shines brighter than Sirius.
Venus has an apparent magnitude [See related link] of -3.82 when it is opposite from the Sun, whereas Sirius has an apparent magnitude of -1.47. So Venus is always brighter (When seen) than Sirius.
Sirius has a luminosity of: 25.4 while Rigel has a luminosity of: 66,000 Making Rigel brighter than Sirius.
Sirius, which means that Rigel is brighter.
No, which means that Rigel appears brighter.
Sirius has less absolute magnitude than Rigel. Sirius is smaller and less luminous than Rigel, but much closer to us, so Sirius appears brighter. Sirius, in fact, is the brightest star in our sky (with the exception of our own star, the sun.) Rigel is still pretty bright, but many times farther away from us than Sirius.
Rigel is brighter.
Rigel is brighter than Betelgeuse.
Rigel is approximately ten times LARGER than Sirius
The apparent brightness of a star depends mainly on (1) its absolute (i.e., real) brightness, and (2) the square of its distance from us. The absolute magnitude of Sirius is +1.45, while that of Rigel is -6.95, meaning that Rigel is approximately 2,290 times as bright as Sirius. However, Rigel is approximately 100 times as far from us (870 light years versus 8.6 light years), which reduces its brightness relative to Sirius by a factor of over 10,000. This makes Sirius about 4.5 times brighter than Rigel for a difference of 1.62 magnitudes (-1.44 relative magnitude for Sirius versus +0.18 for Rigel).
Because Rigel is much farther away. Rigel is 770 light-years away, and Sirius is only 8.6 light-years away.
Rigel is one of the brightest stars in the sky.
No, which means that Rigel is brighter.
Betelgeuse has an apparent magnitude of 0.42(v) and an absolute magnitude of -6.02. Rigel has an apparent magnitude of 0.12 and an absolute magnitude of -7.04. So Rigel is brighter.