Before today's class you should read Moons and Planets, pp. 75-84. These sections are about the formation of stars and chemical compounds.
Before today's class you should read Moons and Planets, pp. 84-95. These sections are about the evolution of stars, especially as viewed through the Hertzsprung-Russell Diagram, and the development of planetary systems. Note the summary list of concepts on p. 96.
The lab today is on the electromagnetic spectrum and using a spectroscope.
Before today's class you should read Moons and Planets, pp. 99-110. These sections are about the formation of dust and other early planetary materials.