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Solar System

Solar System. Mr. Skirbst Physical Science Topic 27. http://www.nineplanets.org/. Nebular Theory. Solar System began as a huge cloud of dust and gas called a nebula. Nebular Theory. Solar System began as a huge cloud of dust and gas called a nebula

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Solar System

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  1. Solar System Mr. Skirbst Physical Science Topic 27

  2. http://www.nineplanets.org/

  3. Nebular Theory • Solar System began as a huge cloud of dust and gas called a nebula

  4. Nebular Theory • Solar System began as a huge cloud of dust and gas called a nebula • This nebula condensed to form the sun and planets while spinning around the center

  5. Sun Formation • Protosun – “developing sun”

  6. Sun Formation • Protosun – “developing sun” • Most gas gathered in center of nebula (place of greatest gravity)

  7. Sun Formation • Protosun – “developing sun” • Most gas gathered in center of nebula (place of greatest gravity) • Nuclear fusion begins (star is “born”)

  8. Planet Formation Protoplanet – “developing planet”

  9. Planet Formation Protoplanet – “developing planet” -smaller clumps of matter gathered and formed, orbiting sun

  10. Planet Formation Protoplanet – “developing planet” -smaller clumps of matter gathered and formed, orbiting sun • Inner Planets – “rocky” (most gasses burned off)

  11. Planet Formation Protoplanet – “developing planet” -smaller clumps of matter gathered and formed, orbiting sun • Inner Planets – “rocky” (most gasses burned off) • Outer Planets – “gas giants” (cooler temperatures)

  12. Planets Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto (now called a Dwarf Planet)

  13. Planetary Motion “Planet” – Greek for “wanderer”

  14. Planetary Motion “Planet” – Greek for “wanderer” Earth-centered System: Ptolemy, Greece 2nd century AD

  15. Planetary Motion “Planet” – Greek for “wanderer” Earth-centered System: Ptolemy, Greece 2nd century AD Sun-centered System: Copernicus, 1500’s (planets orbit the sun, not Earth)

  16. Planetary Motion Elliptical orbits: Johannes Kepller, 1500’s (first to suggest planets orbit in ellipses) Inertia + Gravity: Isaac Newton, 1600’s two forces at work with planets

  17. Planetary Motion Orbit: path around object takes when moving around another object in space Inertia: motion of object will not change unless acted upon by a force

  18. Planetary Motion Gravity: force attracting two objects with mass Period of Revolution: one orbit around sun Period of Rotation: one turn on axis

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