How did Tycho Brahe and Kepler use employ the scientific mehtod?

In 20,000 words or less?

i can`t understand ur question butone thing i will like to point out
for u and the readers-
  at that time,there was no knowledge of gravitation.in such
conditions,in the manner kepler derived his equations i will call him
a genious
  can u imagine to even read the steps of kepler equations without the
knowledge of gravitation?????????
 i dont think so