Why are Class L brown dwarves (dwarfs) just as hot as Class O blue Giants?

[Bokugo]

It's like how the atmosphere of a large planet looks thinner than one on a small planet despite being the same thickness ​i think.

 

[frostypaw]

Well pointed out. Wish I'd made that observation myself and saved the forum 4 pages of drama. 笑

You've been on the forum before right?

 

[GraXXoR]

You've been on the forum before right?

Me? Never, this was my first post.

 

[Crusina Luachra]

This, you standard O class is a lot bigger then your standard brown dwarf, its easy to missjudge distance.

As a matter of fact, that spinning O class star near earth spins so fast because it's much smaller then all the other O classes you come across I believe.

 

[GraXXoR]

As a matter of fact, that spinning O class star near earth spins so fast because it's much smaller then all the other O classes you come across I believe.

Not aware of that one, which star is it? I presume you're talking RL?