And then, 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.
I onda, imao je bolji teleskop, više sitnozrnih podataka u kojima je shvatio da dok Zemlja kruži brže -- po Keplerovim zakonima -- od Saturna, onda se mi uhvatimo s njim.