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H-R Diagram
- 1. This graph compares a stars brightness or Luminosity to its surface temperature (K)
- 2. This is the HERTZSPRUNG – RUSSELL DIAGRAM Aka: H-R Diagram
- 3. We would find that 90% of all stars in the sky are just “Average” stars (Not Too Bright, Hot, or Large)
- 4. These “Average” stars are called “MAIN SEQUENCE STARS”
- 5. The other 10% of stars make up the “GIANTS”, “SUPERGIANTS” and “WHITE DWARFS”
- 9. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars
- 10. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright
- 11. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright
- 12. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 13. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE) These stars obey the general rule that says if the star is hot, then it will also be bright, but if it is cooler then it will appear to be dimmer.
- 14. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE) These stars obey the general rule that says if the star is hot, then it will also be bright, but if it is cooler then it will appear to be dimmer. Moderate to hot stars, but dim because of their small size.
- 15. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim DWARF STARS (WHITE OR BLUE) GIANTS SUPERGIANTS These are cooler stars by their temperature, but bright because of their size. Moderate to hot stars, but dim because of their small size. Bright These stars obey the general rule that says if the star is hot, then it will also be bright, but if it is cooler then it will appear to be dimmer.
- 19. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 20. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 21. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 22. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 23. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)
- 24. 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 100000 20001000050000 SolarBrightness Temperature (K) H-R DIAGRAM PLOT Nearest Stars Brightest Stars Dim Bright SUPERGIANTS GIANTS DWARF STARS (WHITE OR BLUE)