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Exploring Stellar Evolution and Galaxy Types: A Conceptual Overview

This guide delves into the fascinating world of stellar evolution and the classification of galaxies. It covers the life stages of stars, including their origins and the primary phase during which they spend most of their lifetime. Further, it explains the necessary transformation leading to black holes post-main sequence. Additionally, the content discusses various galaxy types such as spiral, elliptical, and irregular, highlighting features and examples like the Milky Way, Andromeda, and prominent star clusters. Unlock the mysteries of the universe and deepen your understanding of star and galaxy formation.

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Exploring Stellar Evolution and Galaxy Types: A Conceptual Overview

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Presentation Transcript

  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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