AST201H1 Lecture Notes - Copernican Revolution, Nicolaus Copernicus, Ellipse

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Published on 20 Apr 2013
School
UTSG
Department
Astronomy & Astrophysics
Course
AST201H1
Professor
Lecture'2:'Kepler’s'Law'and'the'History'of'Astronomy''
*Term'=Star:'an#object#that#generates#energy#by#nuclear#fusion;#i.e.#the#Sun#
How'did'Astronomy'start?'
The#oldest#science#for#humans;#people#wanted#to#learn#astronomy#for#more#
practical#reasons#rather#than#to#know#what#is#the#universe#
Ancient#astronomy#was#geocentric#or#Earth=centered#
o Earth#being#the#center#of#the#universe;#there#is#only#five#planets;#Sun#
is#not#considered#as#a#star#
! Everything#is#revolved#around#the#Earth#
o Pythagorean#ideal#of#circular#motion##
! The#orbits#are#in#perfect#circle#–#Aristotle’s#idea#of#heaven##
! #
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