Astronomy 4

  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
    • Point directly overhead
  7. Kepler's Third law equation
    p^2 = a^3
  8. Newton's second law equation
  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
    3/radius of planet
  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
  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
Card Set
Astronomy 4
first test