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' Heliocentric theory: Unlike Ptolemy's theory the Earth was not the central body, the sun was. This explains why the planets occasionally appeared to be going bac â¦ kward and how we got from day to night.Copernicus went against everyone else by implying the sun was central.ecause having said that he could prove it, he had to admit that he  could not. Although the heliocentric theory is accepted now, it was  not accepted in Galileo's lifetime. â¦ After his death scientific  knowledge advanced to the point that everyone was forced to admit  it was right.