384 – 322 BCE

Aristotle contribution to Astronomy was, discovering that earth was round by using the moon. He saw that during a lunar eclipse earths shadow was a circle. He also knew that earth orbited the sun, but he also thought the stars and planets orbited around them.

310BC-230BC

Aristarchus proclaimed that Earth was not the center of the universe. But the sun was and Earth and all the other planets revolved around it. He also stated that the stars in the distance were all fixed suns and that the universe was bigger than what he could see.

1889-1953

Edwin Hubble showed that we all live in an expanding universe, which helped lead to the discovering of the Big Bang Theory. Also he said that we live in a galaxy and that there are other ones out there.

1473-1543

Nicholas Copernicus made the first sort of accurate diagram of our solar system which scientists built off of. He used the same idea of Ptolemy diagram but it was to complicated so he simplified it.

1571-1630

Keplers Laws
1. We travel I Elipses

2.

3. mathimatical relationship between the sun and how far apart they are.