Use a Timeline to outline the historical developments of models of the universe from Aristotle to Newton.
330 BC Aristotle described the Earth to be a stationary object or Sphere at the .
centre of the Universe with the sun, stars and planets moving Around the.
Earth. This began the concept of a Geocentric Universe.
Aristotle Stated that:.
1) The universe contained the Earth which was surrounded by 55 concentric Spheres .
each sphere containing a heavenly body.
2) The closest Sphere carrying the Moon the outermost spheres carried the stars and the .
other planets such as Mercury, Venus,Sun,Mars,Jupiter and Saturn (Uranus were not .
discovered yet.
3)Movement of these spheres with different spheres, speeds and directions is the reason .
for why the observed motions for the Sun, stars and planets are the way they are back I .
those times.
240 BC Aristarchus proposed that the Earth rotated on its axis thus explaining the daily motion of .
The stars and Sun. He basically proved the Sun was bigger than the Earth and based his .
Theory on that fact.
120 AD Ptolemy wanted a system which would predict the positions of the planets. His work was .
based on the Astronomer Aristotle.
Ptolemy proposed that:.
1) The Earth is the centre of the heavens- a geocentric universe.
2) The heavens of stars is a sphere turning steadily around its axis once every 24 hours.
3) The Earth is a sphere at rest.
1571-1630 Copernicus best known for shifting attention from Geocentric model to Heliocentric .
