Term
|
Definition
1.The stars seem to rotate in fixed circles.
2.The "wanderers" moved erratically. |
|
|
Term
|
Definition
| Knowing that the circle was the shape of the gods he gave his students the task of using circles to describe the movements of the planets. |
|
|
Term
|
Definition
| Proposed the planets followed transparent spheres. Some spheres contained planets others did not. Each sphere was then attached to the sphere outside it. Each sphere was tilted at a specific angle and the spheres rotated at certain speeds. 13 spheres= mercury |
|
|
Term
| Appolonius and Hipparchus |
|
Definition
| They used a model in which the planets moved in circles and the centers also moved in circles. |
|
|
Term
|
Definition
| Developed a model that was earth-centered. All the planets orbit in "circle-on circle" orbits. |
|
|
Term
|
Definition
| when planets appear to stop and reverse direction and then stop again and continue in the original direction. This was explained in Ptolemy's model. |
|
|
Term
|
Definition
| Realized the Earth itself rotated and that it orbited around the sun. Also believed that the outer celestial sphere of stars did not move. |
|
|
Term
|
Definition
| A monk that branded Copernicus as a fool and a heretic. |
|
|
Term
|
Definition
| Believed that the Sun rotated around the Earth and the planets rotated around the sun. Made very precise measurements and measuring tools but was a poor mathematician. |
|
|
Term
|
Definition
| Thought that the Earth rotated on its axis. |
|
|
Term
|
Definition
| Thought the Earth moved around the Sun. |
|
|
Term
|
Definition
| A student of Brahe who was a brilliant mathematician and used Brahe's data to develop the theory. Took the radius of the largest planet and fit it into an isometric solid and then put a sphere inside that which ended up being the radius of the next largest planet. However, there are more planets than isometric solids. But it didn't quite fit Brahe's data so he scraped it. |
|
|
Term
|
Definition
1.The planets orbit the sun in elliptical orbits with the sun at one focus.
2.The line joining the sun and any planet sweeps out equal areas in equal time intervals.
3.R^3/T^2=K |
|
|
Term
|
Definition
| Reasoned that something is pulling the moon inward and thus proved that gravity exists. |
|
|
Term
| Newton's Universal Law of Gravitation |
|
Definition
|
|
