
 Johannes Kepler 
  Kepler's grandfather was Mayor of Weil, Kepler describes his grandmother as "restless, clever and lying, but devoted to religion; slim and of a fiery nature; vivacious, an inveterate troublemaker; jealous, extreme in her hatreds, violent, a bearer of grudges...and all her children have something of this". 
  Kepler's main interest at the time of publication of Mysterium Cosmographicum and after was to get hold of Tycho's data, which he felt would confirm his picture of the solar system. 
  However, Kepler was happy that Tycho suggested he work on the orbit of Mars, which was one of the least circular orbits, and hence a good test of new models, and for which Tycho would be obliged to give him a substantial amount of data. 
 galileo.phys.virginia.edu /classes/109N/1995/lectures/kepler.html (1706 words) 
