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Natural Satellites By: A. Garrett O. Lubag What is a Natural Satellite? tivas.org.uk Moon Celestial Body Planet • • • • Earth : Moon Mars : Phobos and Deimos Pluto : Charon Uranus : Puck, Miranda, Ariel, Umbriel, Titania, Oberon • Neptune : Proteus, Triton, Nereid • Saturn : Mimas, Enceladus, Tethys, Dione, Rhea, Titan, Hyperion, Iapetus, Phoebe upload.wikimedia.org/ How do they form? Theories of Formation • Accretion - Creation is like that of planets • Capture - Some debris in space collided or got caught by larger planets. • Fission - Matter thrown off a planet enters orbit around the planet • Impact -Big body hits planet hard enough to eject matter, which cools and condenses into a moon. Types of Moons Regular Satellites • Orbit closely to its planet • Orbit in the same direction of the planet • Orbit in a circle Irregular satellites • Orbit distantly from its planet • Orbit in the opposite direction of the planet • Orbit in an ellipse Other types of natural satellites • • • • Asteroids Comets Meteors Meteoroids Sources for Images • http://www.tivas.org.uk/solsys/images/moon.jpg • http://upload.wikimedia.org/wikipedia/commons/4/4f/Moon s_of_solar_system_v7.jpg Sources of content • www.sciencelearn.org.nz • http://blogstronomy.blogspot.com/2009/09/h ow-are-moons-formed-where-do-moons.html