Model of the solar system By maikouzhao 100 Claudius Ptolemy 100 Claudius Ptolemy 1473 Nicolaus Copernicus 1473 Nicolaus Copernicus 1564 Galileo Galilei 1564 Galileo Galilei 1571 Johannes Kepler 1571 Johannes Kepler 1656 Edmond Halley 1656 Edmond Halley 1738 William Herschel 1738 William Herschel 1805 Discovery of the first four asteroids 1805 Discovery of the first four asteroids 1811 Urbain Le Verrier 1811 Urbain Le Verrier 1906 Clyde Tombaugh 1906 Clyde Tombaugh 1977 Voyagers 1 and 2 1977 Voyagers 1 and 2