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.
Huygens hadde to ting å gå på: En god teori om planetringer og hvordan solsystemet fungerte. Og han hadde bedre teleskoper som ga tydeligere data,- som gjorde at han fant ut at siden Jorda beveger seg fortere-- i følge Keplers lover-- enn Saturn, så tar vi den igjen-