Whether it's a full moon, a waxing crescent or a new moon, many wonder what's there -down. If there is more to the universe than Earth. The Moons of Jupiter are an unknown subject to many, and there are many interesting facts about it. Galileo Galilei, born in 1564, played an important role in much of the science we know today, and it is thanks to him that we begin to understand the moons of Jupiter. All of these Jupiter moons have their own reason why they stand out. Overall, although Jupiter's moons are unknown to many, they are an important piece in connecting the puzzle of our universe. Galileo was born in 1564 and became involved in science. Due to rumors in 1609, about a Dutchman who invented a device for zooming in on distant objects (this was known earlier in the years as a spyglass, now it is called a telescope). He heard that a patent had been applied for, but it was not granted. This had a lot of value because the methods were kept secret, and it could be used in the army for Holland. Due to rumors, Galileo was soon determined and driven to build his own telescope within 24 hours. hours, using only his knowledge, experiments and elements of rumor, and without ever seeing the real Dutch telescope, Galilei quickly found himself building a 3-power telescope. With a few adjustments, he soon had a 10-power telescope. he demonstrated it in the Senate, and his salary was increased and honored by proclamations. This shows how intelligent Galileo was, able to build his own telescope with nothing but his brain. This was not the end of Galileo, however. was making his nocturnal observations, one day he saw an object that many thought was... middle of paper... his moon. There is about half water ice and half rock material, composed of magnesium and other elements.BibliographyBellis, Mary. “Galileo Galilei – Biography.” About.com Inventors. About.com, December 20, 2013. Web. February 2014. Burdick, fall. "Exploration of the solar system: planets: Jupiter: moons." Exploration of the solar system: Planets: Jupiter: Moons. National Aeronautics and Space Administration, December 13, 2013. Web. February 2014. Space.com. "Europe: Facts about Jupiter's icy moon and its ocean." Espace.com. Np, July 3, 2012. Web. February 2014. Zimmerman, Kim. “Callisto: Facts About Jupiter’s Dead Moon.” Espace.com. Np, July 5, 2013. Web. February 24, 2014Zimmerman, Kim. “Ganymede: Facts About Jupiter’s Largest Moon.” Espace.com. Np, February 13, 2014. Web. February 2014. Zimmerman, Kim. “Io: Facts about Jupiter’s Volcanic Moon.” Espace.com. Np, July 3, 2013. Web. Feb. 2014.