Complex sentence: To determine longitude in navigation, Werner proposed determining time by measuring the position of the moon relative to the background stars in his "In hoc opere haec continentur Nova translatio primi libri geographiae Cl' Ptolomaei..." (Nürnberg 1514).
Split into simpler sentences: To determine longitude in navigation, Werner proposed determining time by measuring the position of the moon relative to the background stars. He published this in "In hoc opere haec continentur Nova translatio primi libri geographiae Cl' Ptolomaei..." (Nürnberg 1514).