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Mr. Vaughan SOL 6.2

Space

TermDefinition
Astronomy The study of the moon, stars, and other objects in space.
Astronomer A scientist who studies the universe beyond Earth.
Asteroid belt The region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found.
Asteroids Objects that revolve around the sun that are too small and too numerous to be considered planets.
Comet A ball of ice and dust whose orbit is usually a long, narrow ellipse
Galaxy A system of millions or billions of stars held together by gravitational attraction
Gas Giants The name given to the first four outer planets: Jupiter, Saturn, Uranus, and Neptune
Geocentric A description of the solar system in which all of the planets revolve around Earth
Gravity The attractive force between two objects; its magnitude depends on their masses and the distance between them
Heliocentric A description of the solar system in which all of the planets revolve around the sun
Meteor A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere
Meteorite A meteoroid that has hit Earth’s surface
Meteoroid A chunk of rock or dust in space
Nuclear Fusion The combining of two atomic nuclei onto a single larger nucleus, as when two hydrogen atoms join together to form helium, releasing energy
Orbit The path of an object as it revolves around another object in space
Retrograde Rotation The spinning motion of a planet from east to west, opposite to the direction of rotation of most planets and moons
Satellite Any object that revolves around another object in space
Terrestrial Planets The name given to the four inner planets: Mercury, Venus, Earth, and Mars
Created by: dougteach65
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