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Astronomy

TermDefinition
solar system a group of objects in space that move around a central star
star a huge burning sphere of gases; for example, the sun
orbit the path an object such as a planet takes as it revolves around a central object
ellipse the shape of Earth's orbit around the sun; an elongated or slightly flattened circle
planet a large object that orbits around a star
rotation the spinning of a planet on its axis
revolution one object moving around another in an orbital path
axis an imaginary line that runs through both poles of a planet; a rotating object spins around this imaginary line
comet a small frozen mass of gas and dust revolving around the sun
asteroid chunks of rock revolving around the sun between Mars and Jupiter
meteorite a small, solid rock traveling through space
satellite a small body, either man-made or natural, revolving around a larger body
astronomer a person who studies stars, planets, and other objects in the sky
telescope an instrument people use to observe distant objects with their eyes
constellation the pattern formed by a group of stars in the sky
Created by: mary.farrow
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