Define perihilon - Study guides, Class notes & Summaries
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EarthSci 1086 - UNIT 2
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What is the heliocentric model? - Answer - Sun is at the center of the Solar System 
 
What is the geocentric model? - Answer - Earth is at the center of the Solar System 
 
Define perihilon - Answer - The point of nearest approach of a planet to the Sun 
 
Define aphelion - Answer - The point of greatest separation 
 
How did Aristarchus contribute to the heliocentric model? - Answer - he experimented with placing Sun at the centre. Satisfied that the geometry seemed to work - and seemed able t...
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