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HR Diagram
| 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) |
| Schematic HR Diagram | D5 |
| Red Dwarf | Most common kind of stars in the galaxy |
| Proxima Centauri | closest star after sun. M spectral type. Not visible to naked eye. |