Galaxy #2 - Research Galaxy #2 - Research Galaxies #3 - Video Galaxies #3 - Video Galaxies Quiz #6 Galaxies Quiz #6 #1 H-R Diagram Video Intro #1 H-R Diagram Video Intro
#4 H-R Diagram Write #4 H-R Diagram Write #1 Light Years Video  #1 Light Years Video #3 Light Years Write #3 Light Years Write The Electromagnetic Spectrum 1 The Electromagnetic Spectrum 1 Spectroscopy of Stars #2 Spectroscopy of Stars #2 Spectrometer Interactive Spectrometer Interactive Spectrum Quiz #5 Spectrum Quiz #5 PBL 1 PBL 1 PBL 2 PBL 2 PBL 3 PBL 3 PBL 4 PBL 4 PBL 5 PBL 5