The next 11 years as imperial mathematician would be the most productive of his life .
Two days after Tycho 's unexpected death on October 24 , 1601 , Kepler was appointed his successor as the imperial mathematician with the responsibility to complete his unfinished work .
The next 11 years as imperial mathematician would be the most productive of Kepler 's life .
Two days after Tycho 's unexpected death on October 24 , 1601 , Kepler was appointed his successor as the imperial mathematician with the responsibility to complete his unfinished work .