Friday: November 8, 2013. Science In The News. Daily Science Question pg 17. Describe the shape of a planetary orbit? What does it look like? Where is the Asteroid Belt located? By what planet?.
Science In The News
Learning Target (LT) # 6Kepler’s Laws of Planetary Motion 11/08/13_____________________________Cornell StyleWrite only underlined text from slides33
1. Law of Ellipses
2. Law of Equal Areas
3. Law of Periods
1. Law of Ellipses: all orbits are elliptical, from nearly circular to parabolic.
e = 0e = 1
“e” is the eccentricity (how stretched to a max of “1”)
2. Law of Equal Areas:
Learning Target (LT) # 6Kepler and Newton 11/12/13_____________________________Cornell StyleWrite only underlined text from slides35
K x a3 = p2(K =1)
p = orbital period
a = distance from Sol
a3 = p2
Orbital periods measured = distance from the Sun.
Example: Jupiter’s orbital period is 11.9 Earth years
Jupiter’s average distance from Sol is 5.2 AU’s.
Newton’s answer: Gravity!
Gravity is effected by distance and mass.
The closer the planet is to the sun, the stronger the gravity AND the faster the planet moves in its orbit,