Tycho Brahe
From Simple English Wikipedia, the free encyclopedia
Tycho Brahe ?, born as Tyge Ottesen Brahe, (lived December 14 1546 – October 24 1601), was an astronomer from Denmark who built a big observatory called Uraniborg on a place called Hven in Denmark. He discovered that the universe besides the solar system was always changing. Johannes Kepler was his helper.