Origin of Solar System

I. Problems to be explained:

1. Distribution of mass

2. Distribution of angular momentum

3. Meteorites and Asteroids (evidences)

4. Distribution of elements

5. Revolution of planets in same plane in same direction around sun

6. Axes of rotation perpendicular to orbital plane

7. Spacing of planets (Titus-Bode Law)

II. Nebular Hypothesis

Rene Descartes (1644)

Kant, Laplace (1796)

III. Dynamic Encounter

(1745 - George Louis Le Clere de Buffin)

Nebular Hypothesis - (Dust-cloud)

(Planetissmal accretion)

T - Tauri Winds

Magneto hydrodynamics

 

 

 

 

Origin of Solar System

Scientific American

Sept. 1975

Ac W Cameron p. 33-43

(Planetismal Accretion)

(Nebular Hypothesis)

Problems

1. Distribution of mass and elements

2. Angular velocity (momentum)

                                Mass                                 Angular Momentum

Sun                         98.865%                                 0.5%

 

Terrestial

Planets                  0.0006%                         0.2%

M,V,E,M

 

Outer Jovian

J,S,U,N            0.134%                                  99.3%

 

Spacing Problem

Magnetohydrodynamics

 

 

 

 

Magnetic Lines

of Force

Side                                                                Top

5. All rotate in same direction (Venus and Uranus)

6. All planets except Pluto lie plane (or nearly so) of Ecliptic

 

Definitions

- Quasar

- Cepheid variables

- Pulsars

- Nova

- Supernova

2. Background Radiation Measurement

Origin of Solar System

Sept. 1975

Scientific American

A. C. W. Cameron p. 33-43

"The Origin and Evolution of the Solar System"

 

- Dust cloud (Planetessimal Accretion)

- Hypothesis or Nebular Hypothesis