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solar system
planets
Term | Definition |
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mass | a body of coherent matter, usually of indefinite shape and often of considerable size |
wieght | 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 | a cloud of interstellar gas and dust |
solar nebula | (astronomy) The rotating flattened cloud of gas and dust from which the sun and the rest of the bodies in the solar system formed, about Read more: http://www.answers.com/topic/solar-nebula#ixzz2jP3mZyYe |
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 | the very outside of the earth |
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 | the very inside of the earth |