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Science

Solar System

TermDefinition
Mass body of coherent matter, usually of indefinite shape and often of considerable size: a mass of dough.
Weight the amount or quantity of heaviness or mass; amount a thing weighs
solar system the sun together with all the planets and other bodies that revolve around it.
nebula Also called diffuse nebula. a cloud of interstellar gas and dust.
solar nebula Astronomers believe that the entire Solar System formed out of a cloud of gas and dust 4.6 billion years ago. This giant molecular cloud is known as the solar nebula
planetesimal one of the small celestial bodies that, according to one theory (planetesimal hypothesis) were fused together to form the planets of the solar system
crust any more or less hard external covering or coating
mantle Geology . the portion of the earth, about 1800 miles (2900 km) thick, between the crust and the core. Compare core1 ( def 10 ) , crust ( def 6 )
core a cylindrical sample of earth, mineral, or rock extracted from the ground by means of a corer so that the strata are undisturbed in the sample
Created by: FaithT
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