Free Text: Intro Astro by Andrea Dobson (Whitman College)
Chapter 0 (pdf): Math Review
Chapter 1 (pdf): Introduction. Slides (pptx). Also for reference, calculus-bsed derivations of Kepler's three laws, vis viva equation, virial theorem.
Chapter 2 (pdf): Solar System Dynamics. Slides (pptx).
Chapter 3 (pdf): Sky Coordinates and Time. Slides (pptx).
Chapter 4 (pdf): Overview of Solar System. Slides (pptx).
Chapter 5 (pdf): Interiors of Terrestrial Planets
Chapter 6 (pdf): Planetary Surfaces: Volcanism
Chapter 7 (pdf): Planetary Surfaces: Cratering
Chapter 8 (pdf): Planetary Atmospheres
Chapter 9 (pdf): Giant Planets and Magnetospheres
Chapter 10 (pdf): Solar System Formation
Chapter 20 (pdf): Telescopes, Optics, Detectors
Chapter 21 (pdf): Table of Contents, Appendices, Index, etc.
OTHER LINKS OF INTEREST: The Nine Planets, Astronomy Picture of the Day
Video links: The Wanderers (4 Minutes).