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. ... 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. ... Developed three ...

• Word Count: 1183
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

Black Holes Every day we look out upon the night sky, wondering and dreaming of what lies beyond our planet. ... Also as a result of the powerful gravitational waves, most black holes orbit around stars, partly due to the fact that they were once stars. ...

• Word Count: 3068
• Approx Pages: 12
• Grade Level: High School

These statements seem absurd from the common point of view, but in fact they are very real and can be easily proven by experiments and by the laws of modern physics. ... In fact, this person would not notice any difference between this force and gravity. ... Ukrainian physicist, George Gamow, proposed a theory in which he said that the universe started out as a small but very massive object and then exploded making stars, planets, and galaxies. ...

• Word Count: 3720
• Approx Pages: 15
• Grade Level: High School

For many years time travel was the stuff of science fiction. This was all just part of the world's imagination until recently. Scientists now believe that the current laws of physics allow us to travel though time. They believe that we can now travel back to see our founding fathers sign the declara...

• Word Count: 2726
• Approx Pages: 11
• Grade Level: High School