Our textbook is "The Cosmic Perspective - The Solar System" by Bennett et al.
You may use editions 6, 5, or 4 of the textbook, with or without media update. The subset of the entire book, called "The Solar System", shown below, is sufficient.
If you want to read up on stars, galaxies, and cosmology, you can get the full version of the book , shown below, but that is not required for ESS 9.
