also sorry for taking 1 and a half year to answer
the habitable zone of r136a1 (star with biggest hab zone in us2) is 0.05 ly big =0
also LogikMacherDE: i think that instead it would be better to replace stephenson 2-18 by r136a1, which would have its habitable zone much further, anyways ima go check on us2
you mean quasars? quasi star?
if the sun was the most masive qusar ever how far would earth to be by stev- god dammit whats was the name of that star something ended with 18 but that you have to be a few million times further away to be normal some long ass years