Thursday, August 25, 2011

retrograde discussion

Helped Kiron get a better handle on planetary motion. Used Stellarium for demonstration purposes. In general, most of the time, the planets, asteroids, dwarf planets, Sun, Moon, move west to east. Briefly, the solar system bodies, except for the Moon, will reverse direction.

I had to keep reminding him to ignore the Earth's daily spin and the apparent motion...

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