STAR LUMINOSITY SURFACE STAR LUMINOSITY SURFACE (X SUN) TEMPERATURE TEMPERATURE (Х 1000°C) (X 1000°C) 1. Orion 3. Polaris 5. Antares 7. Spica 9. Vega 11. Procyon A 13. Regulus 15. Lacaille 17. Sirius...

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Extracted text: STAR LUMINOSITY SURFACE STAR LUMINOSITY SURFACE (X SUN) TEMPERATURE TEMPERATURE (Х 1000°C) (X 1000°C) 1. Orion 3. Polaris 5. Antares 7. Spica 9. Vega 11. Procyon A 13. Regulus 15. Lacaille 17. Sirius B 2. Betelgeuse 4. Achemar 10,000 20 20,000 3 6 5.9 2,000 24 1,000 3 6. Aldebaran 100 4 8. Ceti 10. Sirius A 800 25 .1 4.5 40 12 20 11 50 6.9 12. Sun 1 5.7 1,000 18 14. Procyon B .004 6.6 .02 4.5 16. Altair .01 9 .01 8 18. Alpha Centauri 1.6 5.7 Conclusions: 5. How many types of stars are shown on the HR diagram? 6. How do the brightness and temperature of the sun compare with those of other stars? 7. What is the relationship between luminosity and temperature for stars on the main sequence? 8. Is there a relationship between mass and luminosity for stars on the main sequence? If so, state the relationship.