1. Planetary Orbits III Mr. Jean
Astronomy 12
Planetary Orbits III
Mr. Jean

2. The Plan: Video clip of the day Units of measure in space
Recap of Planetary Motion
Newton’s Cannon

3. Astronomcial Unit:

4. What is a Parsec?
A Parsec is the amount of distance that light travels in 3.26 light years
This is an important unit because it gives us an idea of how far things are away when we look up in the night sky.

7. Newton’s Cannon:
In the late 1600’s Sir Issac Newton predicted that space travel was actually possible.
Here’s his idea:
If you are able to build a cannon with enough power, it could shoot a projectile with enough speed to travel far enough horizontally that any free fall of the cannon ball would be offset by the curivature of the earth.

9. More on Newton:
Amazingly Newton’s understanding of physics and the equations of motion he created give us the ground work for space travel and so much more.
This book also includes most of the fundations to upper level mathematics. (Calculus in particular)

10. What is important for this unit:
You should be able to calculate the force of gravity.
To calculate the gravitational force on a planet
Calculate the orbit of a planet
Calculate the orbital speed of a planet

12. Is there an Edge to our Universe?
Through the Wormhole:
Watch "Through The Wormhole   Season 2 Episode 2   Is There an Edge to the Universe" on YouTube