τούτου δὲ συμβαίνοντος ἀναγκαῖον γίγνεσθαι πάροδον καὶ τροπὰς τῶν ἐνδεδεμένων ἄστρων → but if this were so, there would have to be passings and turnings of the fixed stars
adverb from εὐσεβής; piously: godly.
εὐσεβῶς: ион. εὐσεβέως благочестиво, праведно Pind., Xen., Plat., Dem.: εὐσεβῶς ἔχει Soph. пристало, подобает, надлежит.