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Science Tip

Science Tip. In your stellar evolution concept map, you wrote about all stars in the universe. What area do all stars start out at? What area do stars spend the most time in? In order to become a black hole, which stage did this star enter after the main sequence? Is your concept map done?.

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Science Tip

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  1. Science Tip • In your stellar evolution concept map, you wrote about all stars in the universe. What area do all stars start out at? • What area do stars spend the most time in? • In order to become a black hole, which stage did this star enter after the main sequence? • Is your concept map done?

  2. Star Groups Chapter 27 (p. 561-565)

  3. Galaxy • Def: large group of stars bound by same gravitational force • Contain solar systems and star clusters • Nearest Galaxies • Large Magellanic Cloud (LMC) (150 m.l.y.) • Small Magellanic Cloud (SMC) (same) • Local Group (all within 3 million light yrs)

  4. LMC

  5. Types of Galaxies • Spiral • Mostly young stars, gas, & dust

  6. Our Galaxy: The Milky Way Diameter: 100,000 light-years Thickness at nucleus: 2,000 light-years Sun: 30,000 light-years from the center

  7. Types of Galaxies 1. Spiral • Barred Spiral

  8. Types of Galaxies 2. Elliptical • Older stars, no dust or gas

  9. Types of Galaxies 3. Irregular • Mixture of Galaxies • - Old and New

  10. NCG 6946

  11. M100

  12. NGC 3370

  13. NCG 4565

  14. M104 (The Sombrero Galaxy)

  15. M-81 (Andromeda Galaxy)

  16. NGC 3384 M105

  17. M-84

  18. NCG 4636

  19. Merger of two Spirals to form an Elliptical

  20. Centaurus A

  21. NCG 1705

  22. Star Cluster in M10

  23. Cluster in NCG 6397

  24. G1- Globular Cluster

  25. Omega-Centauri

  26. M 80 Globular Cluster

  27. NCG 6822

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