In a way, you're open sourcing logo designs copyrighted by others, though. Some OSS projects may not care, but others can be just as protective of their branding as full-fledged companies, from what I've seen.
I don’t think that a constellation - lines and dots is under any copyright.
It’s like saying that python logo has a python so it validates all logos that has snakes in logos..
Remember, no actual logos were used, changed, modified...