It wasn't till Huygens had two things: He had a good theory of planetary rings and how the solar system operated, and he had better telescopic, more fine-grain data in which he could figure out that as the Earth is going around faster -- according to Kepler's Laws -- than Saturn, then we catch up with it.
Det var ikke indtil -- Huygens havde to ting. Han havde en god teori om planetariske ringe og hvordan solsystemet virkede. Og så havde han teleskopisk bedre, mere fin-kornede data hvori han kunne regne ud at i takt med at Jorden bevæger sig hurtigere -- ifølge Keplers Lov -- end Saturn, så indhenter vi den.