How to Teach Why the Dynamic Definition of Planets is the best Alex Michael Leonard Klein & Harold Alden Williams Montgomery College, Takoma Park/Silver.

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How to Teach Why the Dynamic Definition of Planets is the best Alex Michael Leonard Klein & Harold Alden Williams Montgomery College, Takoma Park/Silver Spring Alex Michael Leonard Klein & Harold Alden Williams Montgomery College, Takoma Park/Silver Spring

Lesson One: Historical Definitions Seven Light, seven days Sun (a star), planets, and moons around planets Asteroids and Comets and 2002 AA29 (earths other moon?)2002 AA29 9 major planets or ~15 major planets IAU definition August 2006 in Prague Now 8 major planets Seven Light, seven days Sun (a star), planets, and moons around planets Asteroids and Comets and 2002 AA29 (earths other moon?)2002 AA29 9 major planets or ~15 major planets IAU definition August 2006 in Prague Now 8 major planets Aug 14-15, 20082Dynamic Definition of a Planet

Lesson Two: Geophysical Definition Size of planet: Length/(radius or diameter) Size of planet: Mass (kg or g or slugs) Average density (  =M/V=mass/volume) Composition {Chemical, state (plasma, gas/liquid/solid), mineral assemblage} Shape, how round, hydrostatic equilibrium? Aug 14-15, 20083Dynamic Definition of a Planet

Lesson Three: Size Definition Lower and Upper Bounds Aug 14-15, 20084Dynamic Definition of a Planet

Lesson Four: Dynamical Definition Time, evolutionary changes in planets within significant time-frames Chaotic or non-Chaotic Aug 14-15, 20085Dynamic Definition of a Planet

Lesson Five: The Good, the Bad, the Applicable (maybe Ugly) Pros and Cons Future Discoveries Exo-Planets Dynamical Definitions and families of orbits Aug 14-15, 20086Dynamic Definition of a Planet

Title and Image Only Slide Aug 14-15, 2008Dynamic Definition of a Planet7

Same Thing but with Line Box around Figure Aug 14-15, 2008Dynamic Definition of a Planet8

Same Thing but Figure not included in box Aug 14-15, 2008Dynamic Definition of a Planet9

Slide with Text and Figure Lots of Diversity in the Solar System, and Lots of Color Too Note the amazing diversity of objects in the solar system We include here planets, minor planets, and objects we can’t make up our minds about Objects in the Solar System Aug 14-15, 2008Dynamic Definition of a Planet10

Slide with Text and Figure (but with different style) Note the amazing diversity of objects in the solar system We include here planets, minor planets, and objects we can’t make up our minds about Note the amazing diversity of objects in the solar system We include here planets, minor planets, and objects we can’t make up our minds about Aug 14-15, 2008Dynamic Definition of a Planet11

Slide with Text and Figure (but with different style) Aug 14-15, 2008Dynamic Definition of a Planet12

Two Images Side-by-Side with Captions Neat Color-Color Slide Objects in the Solar System Aug 14-15, 2008Dynamic Definition of a Planet13

Title and Multiple Figures: Arrange Them as you Like Aug 14-15, 2008Dynamic Definition of a Planet14 Here’s a color-color plot from web Carroll painting of Triton surface Best Hubble Image of Pluto

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