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Solar System Formation

Solar System Formation. Introduction. The Beginning The Sun The Planets Inner Planets Outer Planets Hemisphere Questions. The Beginning. Most popular theory is called Nebular Theory Process started roughly 4.6 billion years ago Large cloud of dust and gas began to spin

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Solar System Formation

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  1. Solar System Formation

  2. Introduction • The Beginning • The Sun • The Planets • Inner Planets • Outer Planets • Hemisphere • Questions

  3. The Beginning • Most popular theory is called Nebular Theory • Process started roughly 4.6 billion years ago • Large cloud of dust and gas began to spin • 100,000 years to condense in to a proto sun • Protosun gravity caused dust cloud to flaten to a disk • Another 50 million years to began fusion • Once fusion starts the sun entered the “main sequence”

  4. The Sun • 4.598 billion years old • Yellow Dwarf type star currently in its Main Sequence • Creation of the sun used 98% of the dust cloud • Main Sequence denotes the star is in the main part of its life • Energy from hydrothermal fusion of hydrogen to helium. • Fuses 620 million tons of hydrogen per second. • orbits galaxy every 225 – 250 million years. • Average speed 220km/s relative to the galaxy core

  5. The Planets • Started forming once the dust plain flattened • Early Formation started prior to the sun starting Fusion of hydrogen. • The Planets formed from a process called accretion. • Early planets started as dust grains and frozen gas • Early planets were no bigger then a few grains of sand. • These grains grew to sizes of 200 meters.

  6. Inner Planets • Inner Planets made of dust particles • To close to the sun for gas to remain solid • Only solid material such as metals, rock, and heavy elements survived. • The inner planets take up the inner 4 AU of the solar system. • Tiny grains collided in the first few million years • At the end of the process there were 50-100 moon sized planets which eventually collided to form the current planets in the inner solar system.

  7. Outer Planets • Formed in the same manor as the inner planets • Formed much faster than the inner planets. • Outer planets formed within the first 10 million years of the protosun’s creation • So much material existed in the outer edges, after 3 million years reached 4 times the size of earth. • After 10 million years the sun grew to such a size that the solar wind pushed the remaining gas out of the solar system. • The gravity from Jupiter and Saturn helped form the rocky planets.

  8. References http://www.universetoday.com/38118/how-was-the-solar-system-formed/ http://www.universetoday.com/19087/did-our-solar-system-start-with-a-little-bang/ http://en.wikipedia.org/wiki/Sun Http://nasa.gov http://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System

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