20110213

Overheard: prograde/retrograde/diurnal planetary motion

Astronomy 210, Spring Semester 2011
Cuesta College, San Luis Obispo, CA

(Overheard after a whole-class discussion following an in-class activity ("lecture-tutorial") on the relative motions of prograde/retrograde motions of planets with respect to the background stars, and motions of planets across the celestial sphere in a single night.)

Student (realizing that prograde/retrograde motion of planets is much slower than their diurnal motion over a single night after instructor's class-wide explanation): "I don't know if it's because I'm a genius or if you're just a good explainer, but I totally get it now."

(Beat.)

Instructor: "I'm willing to split the difference."

Student: "Fair enough."

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