Renaissance Period
The renaissance came to astronomy with the work of Nicolaus Copernicus, who proposed a heliocentric system, in which the planets revolved around the Sun and not the Earth. His De revolutionibus provided a full mathematical discussion of his system, using the geometrical techniques that had been traditional in astronomy since before the time of Ptolemy. His work was later defended, expanded upon and modified by Galileo Galilei and Johannes Kepler.
Galileo was among the first to use a telescope to observe the sky and after constructing a 20x refractor telescope he discovered the four largest moons of Jupiter in 1610. This was the first observation of satellites orbiting another planet. He also found that our Moon had craters and observed (and correctly explained) sunspots. Galileo noted that Venus exhibited a full set of phases resembling lunar phases. Galileo argued that these observations supported the Copernican system and were, to some extent, incompatible with the favored model of the Earth at the center of the universe.
Read more about this topic: History Of Astronomy
Famous quotes containing the words renaissance and/or period:
“People nowadays like to be together not in the old-fashioned way of, say, mingling on the piazza of an Italian Renaissance city, but, instead, huddled together in traffic jams, bus queues, on escalators and so on. It’s a new kind of togetherness which may seem totally alien, but it’s the togetherness of modern technology.”
—J.G. (James Graham)
“Intellectual life is international. Only a period of discouragement, an age that has given up on itself, that wants to “preserve,” that has been driven onto the defensive, can be intellectually nationalist. Such a period is essentially “conservative.” A person who has progress in his heart is international.”
—Robert Musil (1880–1942)