15.11.09

Galileo the first man who looked the sky


In May 1609, Galileo received a letter from Jacques Badovere, one of his students, who confirmed a persistent rumor: the existence of a telescope for seeing distant objects. Manufactured in Holand, would have allowed the telescope to see stars and invisible to the eye. With this single description, Galileo builds his first telescope. Unlike the Dutchman telescope, it will not deform objects and increases 6 times, or twice as his opponent. During the fall, Galileo continued his telescope.
In November, produces an instrument that increases twenty times. Use time to turn his telescope toward the sky. Quickly looking at the phases of the moon, he discovers that this star is not perfect. Within weeks, he will discover the nature of the Milky Way, count the stars in the constellation of Orion and notes that certain stars visible to the naked eye are indeed star clusters.
Galileo observed Saturn's rings but does not reveal its nature.
On January 7, 1610, Galileo Capital makes a discovery: highlights 3 stars small at the periphery of Jupiter. After several nights of observation, and discovers that there are four orbiting the planet. These are the satellites of Jupiter now called Galilean satellites: Callisto, Europa, Ganymede and Io. So Galileo became the first man who looked at the sky and wondered what was in it. Galileo discovered the spatial world.