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Video library

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Crash Course
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Grade Levels:

10, 11, 12, 9, High school

Subject Areas:

Natural Sciences, science

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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.