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The Solar System. Historical Perspective. Ptolemy (90 – 168 A.D.). Developed system that allowed him to predict location of planets . Planets on small circular orbitals, called epicycles . Geocentric solar system – Earth was center of orbits. System used until 16th century.

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Presentation Transcript
slide2

Historical Perspective

Ptolemy (90 – 168 A.D.)

  • Developed system that allowed him to predict location of planets.
  • Planets on small circular orbitals, called epicycles.
  • Geocentric solar system – Earth was center of orbits.
  • System used until 16th century.
slide3

Historical Perspective

Copernicus (1473 – 1543 A.D.)

  • Heliocentric solar system – sun was center of orbits.
  • Earth was planet and rotated.
  • Planets orbiting around sun explained retrograde motion of Mars, because Earth moves faster than Mars.
slide5

Planet Orbits

Inner Planets

Outer Planets

Planet orbits are elliptical (slightly oval in shape)

solar system scale

Solar System Scale

Sizes Of The Planets And Sun Compared

solar system scale1

Solar System Scale

Planet Distance From Sun Compared

(1 meter @ Troy = 1,000,000 miles in real solar system)

slide8

Sun

Mercury (36 meters)

Venus (67 meters)

Earth (93 meters)

Mars (142 meters)

(1 meter @ Troy = 1,000,000 miles in real solar system)

slide9

Inner Planets

(1 meter @ Troy = 1,000,000 miles in real solar system)

Jupiter (483 meters)

Saturn (886 meters)

Uranus (1,787 meters)

Neptune (2,799 meters)

solar system scale2

Solar System Scale

Sizes And Distances

how does the sun make its energy
How Does The Sun Make Its Energy?
  • Nuclear Fusion - Combining the nuclei of lighter elements to get heavier elements.
  • E=mc2 means that matter can be converted to energy.
  • You know the 3 states of matter found on Earth; they are solid, liquid, and gas.
  • A fourth state of matter exists it is called plasma and is made of charged particles.
  • This state of matter exists in stars.
what is in plasma
What Is In Plasma?
  • The atom contains charged

particles called subatomic

particles (Ions).

  • The particles in the nuclei are

called protons and have a positive charge.

  • The particles outside the nuclei are called electrons and have a negative charge.
  • In the plasma state these particles are separated.
  • Under extreme conditions the nuclei fuse, this is called nuclear fusion.
what does the sun s fusion look like
What Does The Sun’s Fusion Look Like?

+

4 Hydrogen Atoms

Fusion

1 Helium Atom

Energy

slide15

The Inner Planets

Mercury

Mars

Venus

Earth

slide16

Inner Planet Characteristics

  • Distance From Sun: Closer
  • Length Of Year: Shorter
  • Size: Smaller
  • Density: Higher
  • Planet Structure: Core: Metallic

Mantle: Silicate

  • Surface: Canyons, Craters, Mountains, and Volcanoes
  • Atmosphere: Secondary – Thin And Volcanically Created
  • Rings: None
  • Moons: Few - None
slide17

The Outer Planets

Neptune

Uranus

Jupiter

Saturn

slide18

Outer Planet Characteristics

  • Distance From Sun: Farther
  • Length Of Year: Longer
  • Size: Larger
  • Density: Lower
  • Planet Structure: Core: Small & Solid Interior: Liquid (Ju&Sa) Ice (Ur&Ne) Atmosphere: Gas
  • Surface:Gas
  • Atmosphere: Primary – Thick And Created From Nebula
  • Rings:Yes
  • Moons: Many
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