Rationalizing a Firefly - Serenity type setting

[Anaraxes]

Originally Posted by David Johnston2

We've looked closely enough to notice five main sequence stars including...somehow...a blue giant in a quintuple solar system.

Where do you get these details? I'm pretty sure Whedon wouldn't have bothered counting the suns or worrying about where they were on a Hertzsprung-Russel diagram; it's not his thing. As far as I recall, the show itself is mostly silent about the structure of the system other than to mention a bunch of planets and moons of varying habitability and wealth. The movie has the one bit about it being one system in the school flashback.