Geocentric model - A model of the solar system that says earth is considered the center and everything else revolves around it , Nicholas Copernicus - A scientist who stated that The moon revolve around the Earth , heliocentric model - A model that has another name of " sun-centered model " , venus - a planet that went through phases like the moon , Astronomical unit - it represents the average distance between the earth and the sun and it is equal to 150 million Km , terrestrial planets - classifying planets according to the structure, what is the name of planets that are similar to earth , Inner planets - planets whose orbits are between the sun and the asteroid belt , Extrasolar planets - planets that orbit around other stars , Alvin - A researcher and a submariner who found life-forms while exploring hot volcanic vents on the ocean floor , Mars  - which planet that probably had large amounts of water on its surface in the past, Europa moon - One of the famous moons orbiting Jupiter , Titan - A moon orbiting Saturn and is larger than Mercury , Exobiologists - Scientists who search for evidence of life on other worlds , Kuiper belt - it is belt that is located beyond the orbit of Neptune and contains objects and comets , Oort cloud - it is region that surrounds the solar system and extends almost halfway to the nearest star , Pluto - it was considered as the ninth planet in the solar system until 2006 it was redefined as a dwarf planet , Charon - The satellite for Pluto , Comet  - It is a small body of ice, rock, and dust that follows a highly elliptical orbit around the sun, Trojan asteroids - Groups of asteroids are located in the orbits of Jupiter and Neptune and in Kuiper belt , Meteoroid  - is a rocky body, ranging in size from that of a sand grain to that of a boulder, which travels through space.,

Our solar system

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