ASTRONOMY- Weeks 1-3 (final review- methods of viewing, ancient astronomers, light waves)
- University of Wisconsin - River Falls
- Physics And Astronomy
- Physics And Astronomy 117
- ASTRONOMY- Weeks 1-3 (final review- methods of viewing, ancient astronomers, light waves)
Last Modified: 2011-07-18
-near Polaris or the North Star
-Williams Bay, WI
23 HOURS 56 MINUTES
20 mins LONGER than solar year
-believed in the Heliocentric Model
-smaller the number, brighter the star.
*discovered the 26,000 year cycle of stationary point.
*created 1st star catalog
*the time it took each planet to orbit the sun.
*moons around Jupiter
*Saturn shows "bulges"
*recorded positions of the sun, moon, and planets for 20 years.
*astronomer with the golden nose.
*hired Johannes Kepler as his assistant.
- with sun at one focus.
2. Law of Equal Areas.
- planet sweeps out of equal areas in equal times
3. (time to revolve around the sun in YEARS)2 = (average distance from the sun in ALL)3
- motion needs force.
- gravity is a non contact force.
F↓ as Dist. ↑ = inverse relationship (not gravity)
F↓ as Dist.2↑ = inverse squared relationship
the symbol for it is A
the symbol for it is μ
a window. (slows down going through window, then speeds back up)
(going through a prism at different speeds, prism effect)
(light goes everywhere, MANY beams of light)
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