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.
What did Galileo conclude from his observations of Jupiter and Venus? Galieo discovered that the moon has mountains and that the Sun spins. He also discovered that Venus has phases like the Moon. One of Galileos most important discoveries was thâ¦at Jupiter has four moons that orbit around it.