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Transcript of Galileo Galilei
(The Operation of the Geometric and Military Compass)
Main Contributions & Achievements
Galileo contributed in mathematics, technology, physics, science, and literature.
In mathematics, he produced what is called Galileo's Paradox.
In technology, he invented many important tools that contribute to today's society.
In physics, he figured out that a body's weight does not fall based on its proportional weight.
In astronomy, he made many important discoveries.
In literature, he wrote about scientific instruments, astronomy, and dynamics.
Galileo made supporting observations of Nicolaus Copernicus's model of a
meaning that the Earth orbits the sun rather than the other way around.
He also discovered the
Law of Pendulum
Law of Pendulum
involves the time it takes the massive bob to get from one side of to get to the other. It takes the exact same time for each swing, as long as it is not subject to friction or air drag.
As well as observing that Earth orbits the sun, he also made many more
using the telescope.
Galileo was an Italian astronomer, mathematician, physicist.
Galileo's refracting telescope.
Born in Pisa, Italy on February 15, 1564. Died in Arcetri, Italy on January 8, 1642
One starry night of 1609 Galileo looked through a 20-power telescope. As he looked at Saturn, he noticed something around it.
At first he thought it was a group of large moons. Then he thought that there were three stars in one. Later, he concluded that Saturn had rings! Galileo had discovered the rings of Saturn!
He created the
, in 1586. The
is an instrument that measures the density of an object.
Between 1595 and 1598, Galileo also improved the design of a
Geometric and Military Compass
Galileo was one of the first people to use a
in 1609. Later in 1610, he used the
close up on an insect. By 1624, Galileo perfected his
Galileo observed that Venus had a full set of phases, just like the moon.
When Galileo observed Neptune, he mistook it for a dim star. He did not realize that it was a planet, but he continued to observe it until he lost track of it.
Galileo was one of the first people to observe sunspots. Scientists before him saw them but thought that they were something else. For example, Johannes Kepler thought it was just a silhouette of Mercury.
Galileo observed the Milky Way Galaxy. He found many stars were so closely packed together that from Earth, they looked like giant clouds. He also located many stars invisible to the naked eye, like the double star named Mizar in the constellation Ursa Major.
Thanks for watching and have a
This is the hydrostatic balance created by Galileo Galilei
Galileo Galilei, in his writings, described many things including scientific instruments, his observations through the telescope, and dynamics, the science of motion and mechanics. He described scientific instruments in: The
Little Balance (La Billancetta)
1586 describing an accurate balance to weigh objects, and
Le Operazioni del Compasso Geometrico et Militare
1606 on the operation of a geometrical and military compass. In dynamics, he wrote:
Pisan De Motu
1590 on motion, and
1600 on mechanics. Galileo's
The Starry Messenger (Sidereus Nuncius)
1610 described his observations and discoveries in astronomy.
On January 7, 1610, Galileo saw three small objects around Jupiter. On January 10, one disappeared. This helped him infer that the objects were orbiting Jupiter. He concluded that they were satellites, or moons, and that they were Jupiter's largest. He found the fourth moon, January 13.
Galileo produced what is called
, which states that there are just as many perfect square numbers as there are whole numbers. He describes this in his final scientific work, Two New Sciences. Galileo also created the
in 1593, which measures the temperature of a specific area. His design influenced today's thermometer which is used by many people today.
Father of Modern Observational Astronomy
Father of Modern Physics
Father of Modern Science
The pendulum swings from side to side. It takes the exact same time to get from one side to another and never slows down.
This is Galileo's design of the Geometric and Military Compass
The picture (left) shows the phases of Venus.