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Science 8.2

Science Revision

TermDefinition
Astronomer a scientist who studies the stars, planets and other celestial objects
Constellation a group of stars which form a recognisable pattern in the night sky
Dwarf planet a small celestial body that is in orbit around the Sun and is nearly round in shape but with insufficient gravity to sweep its orbit
Geocentric model model of the universe with Earth at its centre
Hellocentric model model of the universe with the Sun at its centre
Retrograde motion apparent loop-like motion of the planets as seen from Earth
Created by: Christian.Donato