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Published byAlan Merritt Modified over 9 years ago
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The luminous celestial body around which Earth and other planets revolve and receive heat and light! Sun
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Star A self-luminous celestial body consisting of a mass of gas held together by its own gravity in which the energy is generated by nuclear reactions in its interior
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Dwarf Planets Objects that were bigger than small solar system bodies such as comets and asteroids but not quite planets. There are five recognized dwarf planets: Pluto, Ceres, Eris, Makemake & Haumea.
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Planet Any of the large celestial bodies that revolve around the Sun in the Solar System
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Inner Planet Any of the rocky, terrestrial planets of Mercury, Venus, Earth, and Mars whose orbits range is within the asteroid belt
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Outer Planet Any of the planets Jupiter, Saturn, Uranus, and Neptune whose orbits lie beyond the asteroid belt
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Moons Moons are a natural satellite of a planet Earth’s moon (natural satellite) revolves around Earth from west to east
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Galilean moons The four largest moons of Jupiter
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Meteoroid A natural chunk of rock or dust existing outside Earth’s atmosphere
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Meteor Small meteoroid that burns upon entry of Earth’s atmosphere
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Meteorites Remains of meteoroids that strike the surface of Earth or the Moon
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Asteroid Piece of rock or metal made up of material similar to that which formed the planets that orbit the Sun
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Comet Consists primarily of ice, dust, and rock whose orbit is a long narrow ellipse
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Orbit A curved path followed by a satellite as it revolves around an object in space
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Gravity The force of attraction that pulls objects toward each other
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Solar System The Sun together with the group of planets that are held by its attraction and revolve around it!
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Space Probe An unmanned spacecraft designed to explore the Solar System and transmit data back to Earth
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Space Shuttle A reusable spacecraft designed to transport people and cargo between Earth and space
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Space Station A large artificial facility designed to be occupied for long periods and to serve as a work space to conduct research
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Rocket A spacecraft that gets power from an engine full of chemical propellants
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Rotation The spinning of Earth on its axis that causes day and night to occur
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Revolution Earth’s year-long elliptical orbit around the Sun
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NASA National Aeronautics and Space Administration; Founded to combine all of the separate rocket development teams in the US to create new rockets.
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