Moon: A moon is a celestial body that has attained enough mass to create its own gravitational field, orbits the Sun, but is not the dominant body in its area. Some moons are large enough to be able to create an orbit around the Sun, but because they have been captured by a planet, they cannot. This means that the large celestial bodies that orbit the 8 planets are moons. Here is a brief description of four of the most important and interesting moons in the solar system: Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”?Get the original essayGanymede, Jupiter – This is the largest moon in the entire solar system, with a diameter of 5,262 km. This moon is so large that if it weren't stuck in orbit around Jupiter, it would probably be classified as a planet. It takes 7.1 days to complete one orbit around Jupiter. The atmosphere contains small amounts of O2 and the surface is made up of ice and rocks. Titan, Saturn – With a diameter of 5,150 km, Titan is the second largest moon in the solar system. Its atmosphere has some similarities with that of Earth and even has lakes made of liquefied hydrocarbons on its surface. It takes 16 days for Titan to complete its orbit around Saturn. Like Ganymede, Titan's surface is made up of ice and rock. Charon, Pluto – Although Pluto is no longer considered a planet, it remains the dominant celestial body in its region, meaning Charon is a moon. Its diameter of 1.212 km is about half the size of Pluto, meaning Pluto and Charon are sometimes called a binary dwarf system. Charon orbits Pluto every 6.4 days. Keep in mind: this is just a sample. Get a personalized article from our expert writers now. Get a Personalized Essay The Moon, The Earth – For us, the most important moon in the entire solar system is ours. The main theory about its creation is that a large body of rock the size of Mars, called Theia, struck Earth shortly after its formation. Part of the Earth that was jettisoned in this collision as well as part of Theia came together to form the Moon. The Moon helps stabilize Earth's oscillations due to its inclined orbit. He also uses his gravitational field to create the ides on Earth. The reason our moon is simply called "The Moon" is that until Galileo Galilei discovered moons orbiting Jupiter, we thought our moon was the only one..