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Stars

Stars. Mr. Skirbst Physical Science Topic 25. Stars. Composition: - determined by spectral analysis - hydrogen (60 – 80%) - helium (20 – 30%) - other (O, C, Ne, N). Star size. Supergiants * 1,000x size of the sun (ex. Rigel ). Star size. Giants * 10 - 100x size of the sun

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Stars

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  1. Stars Mr. Skirbst Physical Science Topic 25

  2. Stars Composition: - determined by spectral analysis - hydrogen (60 – 80%) - helium (20 – 30%) - other (O, C, Ne, N)

  3. Star size Supergiants * 1,000x size of the sun (ex. Rigel)

  4. Star size Giants * 10 - 100x size of the sun (ex. Aldebaran)

  5. Star size Medium (Main-Sequence) * same size of the sun (ex. Sun, Sirius)

  6. Star size White Dwarfs * smaller than the Earth (ex. Van Maanens)

  7. Star size Neutrons * only several kilometers in diameter * a teaspoon would have a mass greater than the entire Earth!

  8. Relative Star Sizes Giant Star White dwarf Neutron Medium-sized Supergiant

  9. Star temperature Color of star can help determine the surface temperature of stars

  10. Star brightness Absolute brightness (magnitude) - light actually given off Apparent brightness (magnitude) - light observed by someone

  11. H-R Diagram Hertzsprung-Russell Diagram * Relates absolute magnitude and surface temperature of stars H-R DiagramH-R Diagram Animation

  12. Star Distances Parallax Method

  13. Parallax

  14. Parallax

  15. Parallax

  16. Parallax

  17. Parallax

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