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Astronomy 4
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Equation for Newton's Law of Gravity
Fsubg= G(Msuba)(Msub'b')/d^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
Drake equation
Np × f life × f civilization × fnow
Scientific method
Simplicity
Falsifiable7
Natural world
Angles of the celestial sphere
Altitude of NCP = your latitude
Zenith is 90 degress from horizon
NCP is 90 degrees from Celestial Equator
Zenith is
90 degress from horizon
Point directly overhead
Kepler's Third law equation
p^2 = a^3
Newton's second law equation
F=ma
Newton's Law of Gravity
Fsubg = G(Msub1)(Msub2)/d^2
Wavelength of light equation
lambda x f = c
Energy of light
E= h x f
Surface-area-to-Volume ratio
3/radius of planet
The celestial sphere
Includes The sun, moon, and stars appear to be on a transparent globe around the Earth
Sky changes due to time
time of the year and position the sun is in can change the stars seen
Sky changes due to location
Different latitudes see different stars differently
Moon Phases
We see moo n phases because we observe some combination of the day and night sides of the moon
Hallmarks of Science
1. Rely on natural causes
2. Simplicity - Occam's Razor
3. Testable - Falsifiability
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
Kepler's Laws of Planetary motion
Newton's Laws of Motion
Newton's Law of Gravity
Tides?
Summer solstice
Summer solstice - Sun 23.5 degrees above celestial equator (more hours of daylight)
Winter Solstice
Sun 23.5 degrees below celestial equator (fewer hours of daylight
Spring and Autumn equinoxes
Sun on Celestial equator
Author
Anonymous
ID
250269
Card Set
Astronomy 4
Description
first test
Updated
2013-12-03T17:51:28Z
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