Saturn's ring

Build a large telescope (23ft long) with better lens grinding techniques, and were able to see Saturn’s rings, which eluded Galileo. Also saw Orion Nebula rather than a single star. Baruch Spinoza also contributed.
 Christian Huygens Netherlands 1656 Saturn's ring

Build a large telescope (23ft long) with better lens grinding techniques, and were able to see Saturn’s rings, which eluded Galileo. Also saw Orion Nebula rather than a single star. Baruch Spinoza also contributed.