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
ἀναγκαῖος, ἀναγκαστός, ἐπακτός, ἀκούσιος, ἀεκούσιος, βίαιος