Stars: Crash Course Astronomy #26

Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives. -- Table of Contents Stars Can Be Categorized Using Their Spectra 1:32 Spectra With Distance Can Identify Luminosity, Size, and Temperature 5:20 The HR Diagram Plots Luminosity vs Temperature 6:33 Most Stars Fall Along the Main Sequence 7:16 -- PBS Digital Studios: Follow Phil on Twitter: Want to find Crash Course elsewhere on the internet? Facebook - Twitter - Tumblr - Support CrashCourse on Patreon: -- PHOTOS/VIDEOS Stars http://ww