In this deeper dive lesson from Yale's Rocket Science for Everyone, astronomer Marla Geha explores the physics underlying orbital mechanics in more mathematical detail, showing how scientific notation simplifies working with the very large and very small numbers common in spaceflight calculations. The lecture then examines Kepler's laws of planetary motion and their application to satellite orbits, connecting historical astronomy to modern rocket science. Positioned as an optional deeper treatment within the broader Rocket Science for Everyone course, the lesson gives students who want more quantitative grounding a bridge between the descriptive orbital lessons and the underlying mathematics.