{ On the Shoulders of Giants Organization of the universe.

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Presentation transcript:

{ 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

Spiral galaxies: Very organized like our Milky Way galaxy

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

Irregular galaxies: No specific shape

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

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

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

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

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

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

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