who was galileo galilei?
Mathematician Astronomer Scientist Physicist Astrologer
contradiction
 Galileo continued to receive visitors until 1642 , when , after suffering fever and heart palpitations , he died on 8 January 1642 , aged 77 . The Grand Duke of Tuscany , Ferdinando II , wished to bury him in the main body of the Basilica of Santa Croce , next to the tombs of his father and other ancestors , and to erect a marble mausoleum in his honour . 

entailment
 For the next decade , Galileo stayed well away from the controversy . He revived his project of writing a book on the subject , encouraged by the election of Cardinal Maffeo Barberini as Pope Urban VIII in 1623 . Barberini was a friend and admirer of Galileo , and had opposed the condemnation of Galileo in 1616 . Galileo 's resulting book , Dialogue Concerning the Two Chief World Systems , was published in 1632 , with formal authorization from the Inquisition and papal permission . 

entailment
 In 1619 , Galileo became embroiled in a controversy with Father Orazio Grassi , professor of mathematics at the Jesuit Collegio Romano . It began as a dispute over the nature of comets , but by the time Galileo had published The Assayer ( Il Saggiatore ) in 1623 , his last salvo in the dispute , it had become a much wider controversy over the very nature of science itself . The title page of the book describes Galileo as philosopher and " Matematico Primario " of the Grand Duke of Tuscany . 

entailment
 When Galileo Galilei was eight , his family moved to Florence , but he was left with Jacopo Borghini for two years . He then was educated in the Camaldolese Monastery at Vallombrosa , 35 km southeast of Florence . 

contradiction
 Despite being a genuinely pious Roman Catholic , Galileo fathered three children out of wedlock with Marina Gamba . They had two daughters , Virginia ( born in 1600 ) and Livia ( born in 1601 ) , and a son , Vincenzo ( born in 1606 ) . 
