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.
For other uses, see Galileo (disambiguation) and Galileo Galilei (disambiguation). Galileo Galilei (Italian: [É¡aliËlÉËo É¡aliËlÉi]; 15 February 1564 â 8 January 1642) was an Italian polymath: astronomer, physicist, engineer, philosopher, and mathematician. He played a major role in the scientific revolution of the seventeenth century.