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On the Shoulders of Giants

On the Shoulders of Giants. Organization of the universe. THE UNIVERSE: 3 theories 1. Open, expands forever 2. Closed, like a saddle 3. expanding and contracting. Galaxies: contain stars, huge clouds of gas and dust (nebulae) which revolve around a nucleus. Three types.

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On the Shoulders of Giants

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  1. On the Shoulders of Giants Organization of the universe

  2. THE UNIVERSE: 3 theories 1. Open, expands forever 2. Closed, like a saddle 3. expanding and contracting

  3. Galaxies: contain stars, huge clouds of gas and dust (nebulae) which revolve around a nucleus.Three types

  4. Spiral galaxies: Very organized like our Milky Way galaxy

  5. Elliptical Galaxies: Sphere or flattened disk, older stars, little gas and dust

  6. Irregular galaxies: No specific shape

  7. Stars: Made up of mostly Hydrogen and Helium. Formed by collapsing gas and dust

  8. Nebulae: Birthplace of stars, globs of gas and dust. Full of radio, UV, IR, and X-Rays

  9. Star Clusters: Open (Pleiades) and Globular(Hercules)

  10. Single star: Our sun. Single star systems are relatively uncommon.

  11. Binary Star systems: Double Stars. Very common type of star system.

  12. Novas: nuclear explosion of a white dwarf star. Causes increased brightness of a star.

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