APPENDIX I.

LIST OF DATES.


Johann Kepler, born 1571; school at Maulbronn, 1586; University of
Tübingen, 1589; M.A. of Tübingen, 1591; Professor at Gratz, 1594;
"Prodromus," with "Mysterium Cosmographicum," published 1596; first
marriage, 1597; joins Tycho Brahe at Prague, 1600; death of Tycho, 1601;
Kepler's optics, 1603; Nova, 1604; on Comets, 1607; Commentary on Mars,
including First and Second Laws, 1609; Professor at Linz, 1612; second
marriage, 1613; Third Law discovered, 1618; Epitome of Copernican
Astronomy, 1618-1621; Rudolphine Tables published, 1627; died, 1630.






APPENDIX II.

BIBLIOGRAPHY.


For a full account of the various systems of Kepler and his predecessors
the reader cannot do better than consult the "History of the Planetary
Systems, from Thales to Kepler," by Dr. J.L.E. Dreyer (Cambridge Univ.