ἀστρονομέω
From LSJ
τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)
English (LSJ)
A study astronomy, Ar.Nu.194, Pl.Tht.174a:—Med., D.L.1.34, Iamb.VP25.112:—Pass., ὡς νῦν ἀστρονομεῖται as astronomy is now practised, Pl.R.530c.
German (Pape)
[Seite 378] die Sterne beobachten, Ar. Nubb. 193 u. sonst; pass., Plat. Rep. VII, 530 c u. Sp. – Med., Iambl.; Diog. L. 1, 134.