5)+The+Solar+System+Ch.+3

= CH. 3 - The Solar System = http://youtu.be/BZ-qLUIj_A0

[|solar alternative energy] Located in the bend of the Orion Arm of Milky Way

[|Explore the Interactive Universe at History Channel]

**Parts of our Solar System:**

http://www.glencoe.com/sites/common_assets/science/virtual_labs/E28/E28.html

[|Tim & Moby: Solar System]

1 star: Sun
 * 8 planets: M,V,E,M,J,S,U,N
 * hundreds of "moons" or natural satellites orbiting the planets
 * The Asteroid Belt (Including Ceres)
 * Several Dwarf Planets or Planetoids: Pluto, Charon, Ceres, Makemake, Sedna, Quaoar, etc.
 * The Kuiper Belt
 * The Oort Cloud
 * Several Dwarf Planets or Planetoids: Pluto, Charon, Ceres, Makemake, Sedna, Quaoar, etc.
 * The Kuiper Belt
 * The Oort Cloud
 * The Kuiper Belt
 * The Oort Cloud
 * The Oort Cloud

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**LAB: A SCALED COMPARISON OF THE DISTANCE BETWEEN THE PLANETS OF SOLAR SYSTEM.**

 Online Virtual Labs : []

GALILEO CARTOON: http://youtu.be/wfPtvSQt0XM


 * Ch. 3.1: Astronomical History of Theories for the Solar System **




 * 140 AD, Greek Mathematician/philosopher **Ptolemy** proposes an idea that we are part of a solar system with Earth being the center and the planets making circular “tilt-a-whirls” called **epicycles** along their orbits. This system model will come to be called the Geocentric  model (geo meaning earth and centric meaning centered).



1543, Polish Astronomer **Nicolaus Copernicus** challenges the geocentric system by proposing the the solar system is **Heliocentric** (helio meaning sun, centric meaning centered). His fear of the Catholic Church being amgry by his position lead him to hide his work. His book //De Revolutionibus Orbium Celestium// was published after he died in 1543.



1610, Italian Astronomer **Galileo Galilei** invents the telescope and witnesses phases on venus. He supports Copernicus’ ** heliocentric ** model of the Solar system

[]



1600, Danish scientist **Tycho Brahe** uses mathematical data to support the ** geocentric ** model modified into his own ideas.

German Scientist and assistant to Tycho, **Johannes Kepler** goes against his master and supports the **heliocentric**  model. Kepler also devises the LAWS OF PLANETARY MOTION.There are three of them:

1) The [|orbit] of every [|planet] is an **ellipse** with [|the Sun] at a focus (Kepler's first law).


 * 1) 2) Planets do not travel consistent speeds on their orbits- faster at **perihelion**, slower at **aphelion**. (Kepler's second law).
 * 2) 3) The farther a planet is from Sun, the slower it revolves.

**[|Isaac Newton] (1642-1727)** **developed the [|Laws of Motion]. At the urging of [|Edmund Halley], Newton published his Laws of Motion and analysis of Gravity in the //Principia Mathematica//, probably the greatest physics text ever written, in 1687.**


 * NEWTONS 3 LAWS ([])**


 * 1) Bodies, Rest & Motion-a body at rest remains at rest; a body in motion remaina in motion and continues in a straight line forever unless the resting or moving body is acted on by another force.**


 * 2) Force - Mass x Acceleration**


 * 3) Action/Reaction**

** T ****eam Geocentric (Ptolemy & Tycho) **

__ **Team Heliocentric (Copernicus, Galileo, Kepler)** __