Greek
Astronomy - Geometry
•300BC
–Aristarchus - size of Sun and Moon relative to Earth, relative
distances (use of geometry to deduce
them)
–using geometrical reasoning D(sun)/D(moon)~20 , R(earth)/R(moon)~20
, R(sun)/R(earth)~7
–Sun is much bigger, so choose heliocentric model (doesn't
take hold, Aristotle wins)
