Biography of Galileo Galilei.
                     Biography 
of Galileo 
Galilei
Early Life
+ Galileo was born in Pisa, Italy where he grew 
up with his brothers and sisters during the 
Italian Renaissance. 
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Family
+ His father was a music teacher and a famous musician. 
+ His family moved to the city of Florence when he was ten years old. 
+ It was in Florence that Galileo began his education at the Camaldolese 
monastery.
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A Budding Scientist
+ While at university, Galileo became 
interested in physics and mathematics. 
+ One of his first scientific observations was 
with a lamp hanging from the ceiling in the 
cathedral. 
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A Teacher
+ In 1585, Galileo left the university and got a 
job as a teacher. 
+ He began to experiment with pendulums, 
levers, balls, and other objects. 
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Hydrostatic balance
+ He tried to describe how penduloms moved 
using mathematic equations. 
+ He even invented an advanced measuring 
device called the hydrostatic balance.
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Tower of Pisa Experiment
+ One of the traditional beliefs was that if you 
dropped two items of different weights, but 
the same size and shape, the heavier item 
would land first. 
+ Galileo tested this idea by going to the top 
of the Leaning Tower of Pisa.
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Copernicus
+ Copernicus was an astronomer who lived in 
the early 1500s. 
+ He came with the idea that the Sun was the 
center of the universe. This was very 
different from the current belief that the 
Earth was the center. 
+ Galileo began to study Copernicus' work and 
felt that his observations of the planets 
supported the view that the Sun was the 
center. This view was highly controversial.
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Telescope
+ In 1609, Galileo heard of an invention from 
Holland called the telescope that could 
make far away items appear much closer. 
+ He decided to build his own telescope. He 
made great improvements to the telescope 
and began to use it to view the planets. 
+ Soon Galileo's version of the telescope was 
used throughout Europe.
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Astronomer
+ Galileo made many discoveries using his 
telescope including the four large moons 
around Jupiter and the phases of the planet 
Venus. 
+ He also discovered sunspots and learned 
that the Moon was not smooth but was 
covered with craters.
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Study on Planet & Sun
+ As Galileo studied the planets and the Sun, 
he became convinced that the Earth and the 
other planets orbited the Sun. 
+ In 1632, he wrote a book called the Dialogue 
Concerning the Two Chief World Systems.
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Death
+ Galileo continued to write while under house 
arrest. In his later years he became blind. He 
died on January 8, 1642.
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