I don't think I understand what you're trying to say...lol
What is there to elaborate?
ya'll obviously believe in flat earth correct?
Flat earth philosophy usually includes the notion that space doesn't exist or that we are under the firmament.......
How the hell can Sirius B even exist under that notion?
In other words it shouldn't matter if they could pin point Sirius B or knew astrology because it should all just be them studying ceiling lights in your own belief, correct?
Why couldn't Sirius B exist in a flat earth model?
How is Sirius B different from a ceiling light?