1. Bellwork 11/12 Please, have your HR Diagram Lab out. Thank you! 
What is gravity? Write down anything you know about it!
Have you heard of Einstein’s Theory of General Relativity? Do you know anything about it?

2. Today: Bellwork & homework check Quick recap on HR Diagram lab
Intro to gravity—as explained by Einstein
Gravity Lab
Notes on Formation of Stars

3. What is gravity?
A force that attracts an object toward another object having mass

4. Newton & Einstein Theory of General Relativity What? Newton Einstein
Objects tend to move in a straight line
Planets move in elliptical orbits because a force, called gravity, is acting upon them
Theory of General Relativity
Gravity is caused by curving the space-time fabric.
What?
Let’s look at this

5. Gravity Lab
In this unit, the term “Gravity” is going to get used a lot…let’s make sure we understand what that term actually means Goal: Understand the idea of gravity and its role in the formation of the universe

6. Story of Gravity…