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unit 1 astro. vocab

mr. arnhold

TermDefinition
astronomy the scientific study of celestial objects beyond earths atmosphere
meteoroid rocky and metallic objects in space range in size from dust grains to small asteroids
asteroid rocky and metallic object in space, larger version of a meteoroid, located within the asteroid belt between mars and jupiter
comet small body of ice, rock and dust
galaxy a large collection of hundreds of billions of stars in space, held together by shared gravity
universe the sum total of all matter and energy
nebula a cloud of interstellar gases
front line the particular distance in the solar nebula from the center where its cold enough for compounds
exoplanet planet outside of our solar system orbiting another star
fusion the compression and heat of the material in the center of the nebula becomes so hot that atoms began to "fuse" together
Created by: stud3ying
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