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Universe

TermDefinition
universe all existing matter
light-year equal to how much light travels in a year
solar system 8 planets and their moons orbiting around a star
galaxy millions of stars made of gas and dust
planet a celestial body orbiting around a star
star a body that illuminates at night made of gas
astronomical-unit a measurement unit of 149.9 million kilometer
Created by: 4801816831
Popular Earth Science sets

 

 



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