Last name: Guerra. This unusual and interesting surname is of Old French pre 9th century origins. Recorded in many spellings including Guerre, Guierre, Laguerre (French), Guerra, Guerrero, (Spanish), Guerreiro (Portugese), Guerri (Italian), Guerriero (Sicillian), and Warr or Warre (English), the name derives from the word 'guerre' meaning 'war'.
Instead, Galileo disproved the Ptolemaic theory, sanctioned for centuries by the Church, which held the Earth to be the central and principal object in the universe, about which all celestial objects orbited.
  Copernicus's theory of 1543 places the Sun at the centre instead.  It explains some of the things that the Ptolemaic theory fails to  explain, like the full range of Venus's phases that Galielo  discovered. Galileo reasoned that this must prove that Copernicus's  theory is right.   However Galileo was wrong about this because Tycho Brahe's model  explains the phases of Venus correctly yet still has the Earth at  the centre.opernicus was dead so he didn't help him, but he helped prove his theory of heliocentrism. His telescope observations helped to prove the theory that everything revolves arou â¦ nd the sun, instead of the geocentric idea that everything revolved around the Earth.