Well, in hindsight we can say  that astronomers were making two auxiliary hypotheses, both of which we would now say were incorrect.
خوب، به صورت ساده می توانيم بگویيم كه ستاره شناسان دو فرضيه كمكی مطرح كردند كه امروزه می گویم هردوشان غلط بود.