Earth Sciences 1086F/G Lecture Notes - Lecture 2: Ecliptic, Ellipse, Celestial Spheres

• School: Western University
• Department: Earth Sciences
• Course: Earth Sciences 1086F/G
• Professor: Anthony Withers

Document Summary

Geocentric model: earth is at the centre of the solar system. Heliocentric model: sun is at the centre of the solar system. Developed around 530 bc by ancient greek philosopher. Pictured earth as a stationary object in space, surrounded by a sphere which contained everything else (including the sun) Objects rotated slowly east at speeds depending on how far they were from earth. 100 years later aristotle"s star student plato deduced the same model. Aristarchus 310-230 bc spent much of his life at a library in. Experimented with placing the sun in the centre of the universe instead. Ptolemy 85- 170 ad spent much of his time in the same library as aristarchus. Very catholic, put the earth back in the centre. Of cially supported by the catholic church and was the model for our solar system for 1400 years! Around 1514, copernicus (1473-1543), a polish scientist played around with the.