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Kepler's laws of motion
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Kepler's laws of motion

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Transcript

  • 1. Johannas Kepler Planetary Orbital Laws
  • 2. Kepler’s First Law
    • The orbit of the planets are ellipses , with the sun at one focus of the ellipse.
  • 3. Ellipses and Eccentricity
    • The amount of flattening of the ellipse is termed the eccentricity.
        • Circle = 0
        • Straight Line = 1
  • 4. Ellipses
    • The sun is not at the center of the ellipse.
    • There is nothing at the other focus.
  • 5. Kepler’s Second Law
    • The line joining the planet to the Sun sweeps out equal areas in equal times as the planet travels around the ellipse.
      • Good Example
      • Perihelion = Point closest to Sun (fastest)
      • Aphelion = Point farthest from Sun (Slowest)
  • 6. Astronomical Distances
    • An Astronomical Unit (AU) is the average distance between Earth and the Sun.
        • Used when measuring distances to other solar system objects.
    • A Light year is the distance it takes light to travel in 1 year.
        • Used to measure distances to other stars and galaxies.
  • 7. Kepler’s Third Law
    • The closer the object is to the Sun the faster its period of revolution.
        • Example:
        • Earth & Mars Orbit