stellar evolution.
Super Massive
hyper mass stars: these are the last sages of the High mass lifespan and can grow up to 10-40 AU.
red hyper giant 100,000 yrs
blue hyper giant 70,000 yrs
yellow hyper giant 120,000 yrs
High mass stars: these stars have very short lifespan but are the most dangerous types out there.
O class stars 1,000,000< mill yrs
B class stars 1,000,000-5,000,000 mill yrs
A class stars 10,000,000-15,000,000 mill yrs
Med mass stars: a normal star lifespan.
F class stars 1,000,000,000-1,500,000,000 bill yrs
G class stars 10,000,000,000-13,000,000,000 bill yrs
Low mass stars: can live for a long time but not as long as the brown Dwarfs.
K class stars 15,000,000,000-25,000,000,000 bill yrs
M class stars 100,000,000,000-1,000,000,000,000
Brown Dwarf : can last to the end of the universe or at it's star era
L class stars 1,000,000,000,000-???
T class stars 1,000,000,000,000-???
Y class stars 1,000,000,000,000-???
Black hole:possibly star at the begging of the universe and can last through the star era and can last up to the degenerate era
X class:
-???