Original: Giordano Bruno , born Filippo Bruno ( 1548 -- February 17 , 1600 ) , was an Italian philosopher , mathematician , astronomer , and occultist best known as a proponent of heliocentrism and the infinity of the universe .
Simplified: Giordano Bruno ( 1548 -- February 17 , 1600 ) was an Italian philosopher , priest , cosmologist , and occultist .