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"Astronomy Chapter 8"
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artificial satellite
aspect
asteroid belt
deferent
direct motion
dwarf planet
eccentricity
ecliptic
ellipse
elongation
epicycle
geocentric model
gravity assist
heliocentric model
inferior conjunction
inferior planet
jovian planet
kuiper belt
natural satellite
planet
quadrature
retrograde loop
retrograde motion
siderial revolution period
siderial rotation period
solar system
superior conjnction
superior planet
synodic revolution period
synodic rotation period
syzygy
terrestrial planet