I use Dinah Moche's popular work "Astronomy: A Self-Teaching Guide" as a textbook for my elective high school Astronomy class. During my years of teaching Astronomy, I have prepared PowerPoint slides to accompany each chapter that I use from the book. I am offering these teaching slides as a service to the TpT community.
Moche's book is an excellent general overview of Astronomy, and I recommend its use as a primary teaching textbook or secondary resource. The first seven chapters of "Astronomy: A Self-Teaching Guide" provide reading material for an entire class of stellar or sidereal astronomy. Chapters eight through eleven provide reading for an entire class of solar system or planetary astronomy. The book is obtainable from Amazon or any major chain bookstore.
The notes refer to the Seventh Edition. Each file includes a list of learning objectives and vocabulary. I have also embedded many links to material on the Internet. The PDF file includes a link to download the original PowerPoint file for that chapter.