A metagiant is an insanely large star that has several solar masses, perhaps reaching 100! Hypergiants become metagiants if they become too heavy, usually if they exceed 100 solar masses. Then, some stars reach the rare stage of being a yellow metagiant, then they explode to a black hole of several solar masses, heavier than the black hole remains of the hypergiant.
|Stellar Luminosity Classes|
|-1 · 0 · I · II · III · IV · V · VI · VII|