**References for Module 2: The History of Gravity and of Astronomy**- Supplement the videos with "OpenStax Astronomy"
- 05: Who's Afraid of the Big Bad Equation?
- A diversion into the nature of mathematics. I find that a lot of people have a fear of math. I make it a point in my classes to overcome that fear if at all possible.
- Here is my article about Equations in physics and astronomy.
- Newton's Laws
- Calculus Made Easy