Kepler's 1st Law
The focus of the Earth's orbit is ....
The Sun
Formula associated with Kepler's 3rd Law
P squared = A cubed
Gravity can be described as....
An attraction between particles/objects
Which term refers to the movement of one object around another?
Revolve
All planets orbit in an ________ motion.
Elliptical
Kepler's 2nd Law says this...
A planet takes EQUAL time to carve out EQUAL areas with the line segment joining the sun.
In Kepler's 3rd Law equation, P stands for this and measures this.
P stands for period.
Time taken to orbit the Sun.
What 2 variables affect gravity?
Mass and Distance
As eccentricity approaches 0, you will get a more ___________ shape.
Circular
Draw: An ellipse with 2 foci and a major axis.
See board.
As a planet get's closer to the Sun, it's velocity...
Increases
In Kepler's 3rd Law equation, A stands for this and A is measures in this?
A stands for distance.
A is measured in astronomical units.
When the distance between 2 objects increases, the gravity....
Decreases
As eccentricity approaches 1, the shape of the orbit gets more __________.
Elongated (elliptical)
Eccentricity of Earth = 0.088
Which planet has a more circular orbit?
Earth
Solve for P when A is 10.
31.62 Earth Years
When the mass of 2 objects increases, the gravitational pull .....
Increases
A planet is orbiting the Sun at a velocity of 20 meters per second. If the planet moves closer to the sun, what velocity would it be orbiting at?
Anything over 20 meters per second.
Calculate eccentricity when ...
Major axis: 5
Focal length: 3
0.6
Solve for A when P is 10.
4.64 Astronomical Units
If the mass of Earth were cut in half....
A. would its velocity increase or decrease?
B. by how much?
A. decrease
B. by half