5.23 2.47 3.86 George Ogden Abell 3.67 2.19 1.13 Robert Henry Dicke 1.15 7.25 2.89 Abu Bakr ibn Tufajl 3.45 2.78 0.35 Stephen Hawking 7.13 5.36 1.18 Charles Messier 10.45 6.19 3.33 James Challis 11.29 10.73 1.15 William Herschel 12.83 13.07 0.56 Johannes Franz Hartmann 12.18 15.11 2.26 Ralph Fowler 13.79 11.78 1.05 Jacques Cassini 15.13 7.12 2.15 Eric Walter Elst 12.58 16.94 3.18 Nicole Oresme 14.58 31.29 2.45 Thomas Gold 18.02 21.03 3.47 Joseph Plateau 13.45 8.15 2.31 Camille Flammarion 16.12 10.34 4.45 Wilhelm Anderson 19.15 21.45 0.45 Maarten Schmidt 21.34 13.45 1.25 Edmond Halley 23.15 12.49 0.95 Gerard Kuiper 22.78 18.23 1.23 Henri Debehogne