Galileo Galilei Quotes


When the moon is ninety degrees away from the sun it sees but half the earth illuminated (the western half). For the other (the eastern half) is enveloped in night. Hence the moon itself is illuminated less brightly from the earth, and as a result its secondary light appears fainter to us.


Citations

Galilei, Galileo. The Starry Messenger. Translated by Stillman Drake, Discoveries and Opinions of Galileo, Doubleday, 1957, p. 55.

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Galileo Galilei
Galileo Galilei
  • Born: February 15, 1564
  • Died: January 8, 1642
  • Nationality: Italian
  • Profession: Scientist

Galileo di Vincenzo Bonaiuti de' Galilei was an Italian astronomer, physicist and engineer, sometimes described as a polymath, from Pisa. Galileo has been called the "father of observational astronomy", the "father of modern physics", the "father of the scientific method", and the "father of modern science".