[DOC] [TLE] Back to the main document [PAR] There, at age 25 while teaching, he realized that the orbits of the then known 5 
planets ... with Brahe's extensive data, Kepler discovered that he could indeed 
arrive at a ... Galileo, then professor of mathematics at the University of Padua, 
also ran an ... which he quickly (within four months) improved to a 30 power 
instrument. [DOC] [TLE] No. 30 - 2009: Galileo and the 400th Anniversary of the Telescope [PAR] This 400th anniversary of Galileo's first use of the telescope for astronomy is part 
of ... In 1609, Galileo held the chair of mathematics at the University of Padua, 
then the leading Italian university. ... Galileo built improved telescopes of 20- and 
30-power. By December 1609, he had discovered that the Moon is not the 
perfectly... [DOC] [TLE] Galileo Galilei - Wikipedia [PAR] Galileo Galilei was an Italian astronomer, physicist, engineer, philosopher, and 
mathematician .... Livia took the name Sister Arcangela and was ill for most of her 
life. ... While a young teacher at the Accademia, he began a lifelong friendship 
with ... of Padua where he taught geometry, mechanics, and astronomy until 1610
. [DOC] [TLE] Galileo Galilei (Stanford Encyclopedia of Philosophy) [PAR] Mar 4, 2005 ... While in Padua he met Marina Gamba, and in 1600 their daughter Virginia was ... 
In 1610 he published The Starry Messenger, and soon after ... He had worked 
hard for this position and even named the moons of Jupiter after the Medici. ... 
Galileo discovered many things: with his telescope, he first saw the... [DOC] [TLE] Galileo - Astronomer, Scientist - Biography.com [PAR] Dec 2, 2015 ... He also constructed a telescope and supported the Copernican ... observations 
of nature with long-lasting implications for the study of physics. He ... While at 
Pisa, Galileo was exposed to the Aristotelian view of the ... found a new position 
at the University of Padua, teaching geometry, .... October 30, 2016... [DOC] [TLE] Cosmological Revolution IV: Galileo [PAR] The telescope would lead to major new discoveries, and for the first time 
distinguish ... Perhaps this is one reason that Galileo did not use Kepler's 
elliptical orbits: they ... the lens system to produce a crude but effective 30x 
magnification in a telescope. ... detailing the amazing discovery he had made: the 
moons of Jupiter. [DOC] [TLE] Four hundred years since Galileo's astronomical discoveries - World ... [PAR] Aug 15, 2009 ... Galileo is primarily recognized for his use of the telescope to demolish the ... 
followed by, in 1610, the discovery of the four moons of Jupiter (now known as 
the ... At Tubingen, where Kepler began his studies, one of his teachers was .... (4
) He then obtained an appointment to the University of Padua in the... [DOC] [TLE] Galileo's Anagrams and the Moons of Mars - MathPages [PAR] Janssen exhibited and sold his telescopes widely. ... Early in 1610 Galileo, then a 
teacher at Padua, wrote ... Wanting to establish his priority of discovery, but not 
yet ready to reveal what he had found, he sent to Kepler ... A good example is 
that when he learned of Jupiter's four moons, and compared this with the Earth's 
one... [DOC] [TLE] NASA K-12 Internet: Online from Jupiter 97 -- About Galileo [PAR] After four years, Galileo had decided on his life's work: he announced to his ... 
Galileo noticed a lamp swinging overhead while he was in a cathedral. ... In the 
end, Galileo left the University of Pisa without a degree--a college dropout. .... On 
January 7, 1610, Galileo turned his 30 power telescope towards Jupiter, and 
found... [DOC] [TLE] The Life and Times of Galileo - Illinois State University [PAR] Using a telescope generally much poorer than one might purchase in any retail 
store ... Within a short while he obtained his father's consent to abandon the study 
of ... Following his first year at the University of Padua, Galileo's teaching contract 
was ..... The discovery of Jupiter's four moon showed the incorrectness of

Question: While teaching at the Univ. of Padua in 1610, he discovered 4 moons of Jupiter using a 30-power telescope
Answer: Galileo