On this day (August 25), 1609, in the Republic of Venice, Galileo Galilei presents and demonstrates his first telescope before the Senate.
Galileo Galilei born in Pisa, Tuscany on February 15, 1564, was an Italian astronomer, philosopher, engineer, mathematician and physicist, closely related with the scientific revolution.
Among other things he has been called the "father of astronomy" thanks to his improvements to the telescope and his observations.
There are several theories about who invented the telescope. According to computer scientist and history researcher Nick Pelling, the first creator of the telescope was Juan Roget (an eyeglasses manufacturer from Gerona, Spain).
After Roget , others wanted to imitate and patent this new invention called a telescope.
Galileo received a letter from a former student indicating the invention of the telescope that allowed the stars to be seen directly. Based on the instructions in the letter, Galileo built his own by improving the existing one.
Unlike the Dutch telescope that he had been told about, Galileo's telescope did not deform objects and magnified the image up to 6 times (twice as much as the previous one).
The public presentation of his telescope (this one with magnification up to 9 times) is a complete success that amazes those present, making them see the island of Murano, which was 2 and a half kilometers away, as if it were 300 meters away.
From then on Galileo begins to make observations of space with his new telescopes and begins to create his heliocentric theory (as the Earth moves around the Sun) which will bring him a philosophical confrontation with the holy inquisition of the Catholic Church.
Currently there are several types of telescopes.
As an "astronomical" curiosity to comment that the names of the planets were initially given by the Greeks in honor of their gods; Ares (god of war), Zeus (father of all gods) and Cronus (protector of agriculture). Later the Romans romanized them as their gods had romanized; Mars (by Ares), Jupiter (by Zeus) and Saturn (by Cronos). The planets discovered later were also taking names of Roman gods; Uranus (comes from the word Ouranus, the Greek name for the sky), Neptune (god of the sea) and "current non-planet) Pluto (god of the underworld).
- Here I present to you... the telescope!
- what did he say?
- the telescope!
- it looks like an elongated coil of metal to me
- a telescope!
- young man, don't yell, what is it for?
- to see the stars
- when they hit you with metal?
- no, when looking at this side of the cylinder
- and they hit you while watching
- no... no... look, look...
- no, it hits me.