Equations Flashcards
1
Q
Equation for Kepler’s Third Law
A
p^2 = a^3
p = planet’s orbital period in years
a = semi-major acid in AU
2
Q
Newton’s Universal Law of Gravity
A
F = GMm/r^2
F = force of gravity
G = “big G”
M = bigger mass
m = smaller mass
r = radius; distance between centers of big and small masses
3
Q
Newton’s Version of Kepler’s Third Law
A
M * P^2 = 4pi^2 / G * a^3
4
Q
What does AU stand for?
A
Astronomical Unit - Distance from the Sun to the Earth
5
Q
Value for Speed of Light
A
3.00 * 10^8 m/s
6
Q
Brightness of Stars (to Determine Distance to Stars)
A
B = L / 4piD^2
Brightness = Luminosity/(Distance)^2
7
Q
Stefan-Boltzmann Law
A
L = 4piR^2óT^4
