How does the typical peak luminosity of a Bright Giant compare to a Supergiant?
Answer
A Bright Giant peaks around hundreds to a few thousand times that of the Sun, far less than a Supergiant
The fundamental difference between a bright giant (Class II/III) and a supergiant (Class I) lies in their scale of energy output. A bright giant shines with the collective light of hundreds to a few thousand times that of the Sun. In contrast, supergiants are vastly more luminous, capable of exceeding ten thousand times the Sun’s output. This luminosity difference is intrinsically linked to their physical size and evolutionary stage; supergiants represent the most extreme, massive, and luminous objects still undergoing fusion.
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