Here's why:
* Luminosity: Rigel is a supergiant star, meaning it's much larger and hotter than our Sun. It has a luminosity (total energy output) about 85,000 times greater than the Sun.
* Apparent Magnitude: While Rigel appears as a bright star in our sky, its apparent magnitude (how bright it appears to us) is influenced by its distance. However, its absolute magnitude (intrinsic brightness) is about 7 magnitudes brighter than the Sun. This means that if Rigel were at the same distance as the Sun, it would appear much brighter in our sky.
In short, Rigel is a much more powerful star than our Sun, producing far more energy and shining much brighter.
