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Feb 15, 1564
Galileo Galilei
Born in Pisa, Italy -
Hydrostatic balance
What Galileo described was an accurate balance for weighing things in air and water, in which the part of the arm on which the counter weight was hung was wrapped with metal wire. -
First Thermometer
Galileo Galilei is often claimed to be the inventor of the thermometer. However the instrument he invented could not strictly be called a thermometer: to be a thermometer an instrument must measure temperature differences; Galileo's instrument did not do this, but merely indicated temperature differences. -
Invents a Geometric and military compass.
Consisting of two rulers connected at one end by a joint and marked with several scales. This was a mathematical instrument. It was used to solve practical mathematical problems. He taught its use to his private students and wrote an instruction manual, that was later published. -
The Telescope
The device, called a spyglass, was used to magnify distant objects on Earth. As soon as Galileo learned about the device, he built one and set about improving it, creating the first refracting telescope. The primary lens was convex, and the second lens, the eyepiece, was concave -
Discovery of Four Moons
he is most known for his discovery of the four most massive moons of Jupiter: Io, Ganymede, Europa, and Callisto. This man is an honored astronomer. -
The Pendulum
A pendulum is a weight suspended from a pivot so that it can swing freely. From the first scientific investigations of the pendulum around 1602 by Galileo Galilei, the regular motion of pendulums was used for timekeeping, and was the world's most accurate timekeeping technology until the 1930s. -
The Death of Galileo
8 January 1642, Arcetri
