PHENOMENON:

What did you observe?What evidence do you have?

 

 OBJECTS:

Define the system.What objects are

interacting? 

 MOTION:

Describe the motion that in the model that explains your observations

 

 

MODEL:Diagram of the model thatDescribes the motion and observations (evidence)

                       

     

Unit: _____________ Topic: __________________________

Aristotle (350 B.C.)Greek

• Formulated a picture of the solar system that put Earth at its center with all the other heavenly bodies orbiting around it.

• GEOCENTRIC model• The orbits were described as perfect

circles.

The retrograde (backward, looping) motion of Mars.A composite image created by superimposing images taken on twenty-nine different dates.

The “Wanderers”

The Greeks continued to watch the night sky, The Sun, moon, stars moved predictable orbit in the

sky. BUT, there were five “objects” that did not follow this

regular, predictable motion Once every year, they’d move BACKWARDS

(retrograde) for a month or two!! They “wandered”, thus called planetes

(Mercury, Venus, Mars, Jupiter Saturn)

Observations

• http://www.davidcolarusso.com/astro/

Watch the animation and make observations about the motions of the planets and the Sun on your handout

Ptolemy (Greek) A.D. 140

Attempted to make a MODEL of the solar system that explained the motions of the planets you just observed!

The model had to be testable by predicting future motion of the planets

What does Ptoloemy’s model look like?Then construct a model to explain the observed motion of the planets

Ptolemy’s model of the Solar System/Universe

Epicycle

To be continued….

http://www.youtube.com/watch?v=utH-GHH1FT8&feature=related

Ptolemy

http://www.youtube.com/watch?v=GevV1yvMJbcHistory Channel