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HR Diagram

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Term
Definition
HR diagram   a graph of luminosity versus spectral type. Requires a known parallax (luminosity) and based upon observed spectral lines(temperature) (Spectral type)  
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Schematic HR Diagram   D5  
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Red Dwarf   Most common kind of stars in the galaxy  
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Proxima Centauri   closest star after sun. M spectral type. Not visible to naked eye.  
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Created by: davidvachon1
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