{ On the Shoulders of Giants Organization of the universe.
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Transcript of { On the Shoulders of Giants Organization of the universe.
{
On the Shoulders of Giants
Organization of the universe
THE UNIVERSE: 3 theories1. Open, expands forever2. Closed, like a saddle3. 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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