The first PowerPoint presentation includes a brief description of what stars are, different types of stars, and how light travels. Then it goes into detail about a few constellations. (Ursa Major, Orion, and Scorpius).
The next PowerPoint is only about constellations and the mythology behind them. There is some overlap between the two presentations, so the constellations presentation should have a bit of review for your students. The constellations presented are
Ursa Major and Minor
Canis