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Historical Models of our Solar System Miss Scillieri 6th Grade

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Title: Historical Models of our Solar System Miss Scillieri 6th Grade


1
Historical Models of our Solar System Miss
Scillieri 6th Grade
2
Geocentric Model
  • Geocentric-Earth is center of our Solar System
  • Unexplained on how planets appear to move
    backwards
  • Ptolemy- Was an ancient Greek scientist who
    theorized planets and Sun move in small circles
    around Earth

3
Heliocentric Model
  • Sun is center of our Solar System
  • Nicholas Copernicus was a Polish astronomer, who
    first suggest heliocentric theory and vaguely
    mapped out the planets orbiting the sun in a
    circular orbit.

4
Galileo
  • Supporter of Copernicuss Heliocentric theory
  • Observed moons orbiting Jupiter and theorized
    objects can revolve around other planets not just
    Earth
  • Telescope was crude, he saw only 4 of 63 moons of
    Jupiter
  • Galileo proved heliocentric theory by observing
    the moons of Jupiter. He was placed under house
    arrest. If he did not denounce or say his
    science was a lie he would face death.

5
Not a perfect circlean ellipse
  • Tycho Brahe- studied Solar System and made very
    accurate recordings of his observations-
    scientific method!
  • Tychos assistant, Kepler, used information for
    the details of orbits, this complex math based on
    observations would not be published to after both
    men had died.
  • Using Braches data, scientist Kepler found out
    that each planet moves around the sun or is
    wheels on wheels Simply put each planet orbits
    the Sun in an ELLIPTICAL orbit of a certain size.

6
Exit Slip As brain pop plays answer these
questions Name
Date
  • Sketch a geocentric model using the Earth and
    Sun
  • Match the scientist to his contribution
  • __ Used a telescope to discovery moons of Jupiter
    proving HELIOCENTRIC theory
  • ___ Supported the GEOCENTRIC theory and thought
    planets orbited in CIRLCES
  • ___ Used complex math equations to prove planets
    move in ellipses
  • ___ First person to theorize heliocentric theory
  • Copernicus
  • Galileo
  • Kepler
  • Ptomely
  • Sketch a heliocentric model using the Earth and
    Sun

7
Keplers Laws of Planetary Motion
  • 1st Law - Law of Ellipses
  • Each planet orbits the sun in a path called an
    ellipse or elongated circle
  • Ellipse is a closed curve whose path is
    determined by 2 points or foci within the ellipse
  • Focus 1 is the Sun and Focus 2 is an imaginary
    point
  • Semi-major axis average distance from sun (AU)
    ½ major axis

8
Eccentricity
  • Degree of elongation or shape of planets orbit
  • Ratio between the foci and length of major axis
  • Circular 0
  • Very elongated 1

9
2nd Law Law of Equal Areas
  • An imaginary line between the Sun and a planet
    sweeps out equal areas in equal times as the
    planet travels around the ellipse.

10
3rd Law Law of Periods
  • Mathematical relationship P2 a3
  • a semi-major axis (planets average distance from
    Sun measured in AUs)
  • p planets orbital period (time)

11
Newton
  • Used Keplers Laws of planetary motion and
    published Principia for short. In this
    publication, considered to be the greatest piece
    of scientific literature ever written.
  • Contains Newtons laws of motion including
    universal gravitation.

12
Einstein (1879-1955)
  • Changed Newtons gravitational theory based on
    findings of Mercurys orbit.
  • Developed Theory of Relativity. It completely
    changed the way we study gravity and even changed
    our understanding of the universe.

13
Keplers Laws Simulations
  • Click http//www.physics.sjsu.edu/tomley/kepler
    .html
  • Bibliography
  • http//www.astro.umass.edu/myun/teaching/a100/ima
    ges/geocentric.jpg
  • http//www.physics.hku.hk/nature/CD/regular_e/lec
    tures/images/chap04/heliocentric.jpg
  • http//www.3villagecsd.k12.ny.us/wmhs/Departments/
    Math/OBrien/galileo5.jpg
  • http//galileo.rice.edu/sci/brahe.html
  • http//www.asu.cas.cz/had/tycho.jpg
  • http//cseligman.com/text/history/ellipse2.jpg
  • http//www.windows.ucar.edu/the_universe/uts/keple
    r3_small.gif
  • http//library.thinkquest.org/27585/frameset_intro
    .html
  • http//hyperphysics.phy-astr.gsu.edu/hbase/relativ
    /imgrel/merc.gif
  • http//zebu.uoregon.edu/soper/Orbits/eccentricity
    .gif
  • http//www.physics.hku.hk/nature/CD/regular_e/lec
    tures/images/chap04/geocentric.jpg
  • http//outreach.atnf.csiro.au/education/senior/cos
    micengine/images/cosmoimg/keplerellipse.gif
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