Giuseppe Piazzi used this instrument to discover #Ceres in 1801! It's still in #Palermo #Italy today pic.twitter.com/qWpyi2Vsyj— NASA's Dawn Mission (@NASA_Dawn) 17 Settembre 2015
Giuseppe Piazzi used this instrument to discover #Ceres in 1801! It's still in #Palermo #Italy today pic.twitter.com/qWpyi2Vsyj