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Solar System

The Solar System originated from a massive cloud of dust and gas known as a nebula. This nebula condensed under gravity, forming the Sun at its center, a process which marked the birth of our solar system as nuclear fusion ignited in the developing Sun, or Protosun. Smaller clumps of matter evolved into protoplanets, ultimately forming the inner rocky planets and outer gas giants. Understanding the formation process is key to grasping planetary motion, including elliptical orbits shaped by gravity and inertia, as proposed by historical figures like Copernicus and Kepler.

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Solar System

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Presentation Transcript

  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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