Whether it's a full moon, a crescent moon, or a new moon, many wonder what's out there. If there is more to the universe than just Earth. The Moons of Jupiter are a topic unknown to many and there are many interesting facts about it. Galileo Galilei, born in 1564, played a huge role in much of the science we know today, and it is thanks to him that we are starting to understand Jupiter's moons. All these moons of Jupiter have their own reason why they stand out. All in all, even though Jupiter's moons are unknown to many, it is an important piece in connecting the puzzle of our universe. Galileo Galilei was born in 1564 and was invested in science. Due to rumors in the year 1609, about a Dutchman who invented a device that magnified distant objects (this was known as a telescope earlier in the years, now it is known as a telescope. He heard that a patent was applied for, but it was not granted. There was a lot of value in this because the methods were kept secret, and this could be used in the military for Holland Because of the rumors, Galileo was soon determined and driven to build his own telescope Within 24 hours, using only the. his knowledge, experimentation and some rumors, and without ever seeing the real Dutch telescope, Galileo soon found himself building a 3-magnification telescope, and his salary was increased, and honored with proclamations. This shows how intelligent Galileo was, being able to build his telescope with nothing more than his brains. This, however, was not the end of Galileo as he was making his observations night, one day he saw an object that many believed to have... means of paper... his moon. There is about half frozen water and half rocky material, which consists of magnesium and other elements. Bibliography Bellis, Mary. "Galileo Galilei - Biography." About.com Inventors. About.com, December 20, 2013. Web. February 2014. Burdick, Autumn. "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. "Europa: Facts about Jupiter's icy moon and its ocean." Space.com. Np, July 3, 2012. Web. February 2014. Zimmerman, Kim. "Callisto: Facts About Jupiter's Dead Moon." Space.com. Np, July 5, 2013. Web. February 24, 2014 Zimmerman, Kim. “Ganymede: Facts About Jupiter's Largest Moon.” Space.com. Np, 13 February 2014. Web. February 2014. Zimmerman, Kim. "Me: Facts about Jupiter's volcanic moon." Space.com. Np, 3 July 2013. Web. February. 2014.