Why Lesson Planet?
This link takes you to a comprehensive unit that delves into emission spectra and supernovas. There are four parts: How and where elements are created, electromagnetic radiation, spectroscopy, and the newest technology for studying our universe. Each part consists of three to six lessons consisting of an online reading passage and related assignment. A hands-on activity is also provided for each section. As you would expect from NASA, this unit is out of this world!