AST 2003 Lecture Notes - Lecture 4: Uraniborg, Retrograde And Prograde Motion, Physical Law
Document Summary
Astronomy notes 9/1/2016: 3 stars in a row is the orion belt which allows you to be able to see the rest of the orion"s body and his shield. Big dipper: spica is in the virgo constellation and is blue, the arc torus is red. We started to look to the stars for a since of time. The weekdays are dedicated to the celestial objects: navigation. Used the constellations as a compass to guide them towards the sea and back home: seasons. Helps predict the change of seasons to then know when to grow and harvest crops. Stonehenge is a temple in england that helped them predict the changes of seasons based on the rocks. Knowing the seasons also helped them know what they could plant in that seasons of agriculture. Pythagorean: 2500 years ago, sky: logic and physical law. Ptolemy: (90-168 bc, earth was at the center orbit of all the planets.
