# Astronomy 4

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1. Equation for Newton's Law of Gravity
Fsubg= G(Msuba)(Msub'b')/d^2
2. Kepler's Laws
• 1. The orbit of each planet and the Sun is an ellipse with the sun at one focus
• 2. As a planet moves around its orbit, it sweeps out equal in equal times
• 3. More distant planets orbit the at slower average speeds, obeying the relationship
3. Drake equation
Np × f life × f civilization × fnow
4. Scientific method
• Simplicity
• Falsifiable7
• Natural world
5. Angles of the celestial sphere
• Altitude of NCP = your latitude
• Zenith is 90 degress from horizon
• NCP is 90 degrees from Celestial Equator
6. Zenith is
• 90 degress from horizon
7. Kepler's Third law equation
p^2 = a^3
8. Newton's second law equation
F=ma
9. Newton's Law of Gravity
Fsubg = G(Msub1)(Msub2)/d^2
10. Wavelength of light equation
lambda x f = c
11. Energy of light
E= h x f
12. Surface-area-to-Volume ratio
13. The celestial sphere
Includes The sun, moon, and stars appear to be on a transparent globe around the Earth
14. Sky changes due to time
time of the year and position the sun is in can change the stars seen
15. Sky changes due to location
Different latitudes see different stars differently
16. Moon Phases
We see moo n phases because we observe some combination of the day and night sides of the moon
17. Hallmarks of Science
• 1. Rely on natural causes
• 2. Simplicity - Occam's Razor
• 3. Testable - Falsifiability
18. Copernican revolution
Copernicus- Sun centered model of the solar system

Tycho - accurate observations to test the model

Kepler - modified model to account for Tcho's observations
19. Kepler's Laws of Planetary motion
20. Newton's Laws of Motion
21. Newton's Law of Gravity
Tides?
22. Summer solstice
Summer solstice - Sun 23.5 degrees above celestial equator (more hours of daylight)
23. Winter Solstice
Sun 23.5 degrees below celestial equator (fewer hours of daylight
24. Spring and Autumn equinoxes
Sun on Celestial equator
 Author: Anonymous ID: 250269 Card Set: Astronomy 4 Updated: 2013-12-03 17:51:28 Tags: Astronomy Folders: as Description: first test Show Answers: