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chapter 28 vocab

TermDefinition
planetesimal any of numerous small celestial bodies that may have existed at an early stage of the develeopment of the solar system
retrograde motion tending torward or resulting in a worse previous state
ellipse a closed plane curve generated by a moving point
astronomical unit a unit of length used in astronomy equal to the mean distance of the earth from the sun or about 93 million miles
eccentricity establisment of a planet or animal in a new habitat
terrestrial planet relating or occuring on the earth
scarp a ditch/slope caused by erosion
gas giant planet planets made of hydrogen and helium
liquid metallic hydrogen interior of jupiter
belt a strip of flexible material
zone any of five great divisions of the earths surface with respect latitude and temperature
dwarf planet a celestial body that orbit the sun and has a spherical shape but large enough to disturb other objects from its orbit
meteoroid particle itself without a realtion to the phenomena it produces entering the earths atmosphere
meteorite a peice of rock or metal
kuiper belt a band of small celestial bodies beyond the orbit of neptune
comet an object in outer space that develops a long bright tai when it passes near the sun
meteor shower a shower of meteors
Created by: aliyahchafin
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