Introductory Astronomy: Causes of the Seasons

Video lecture that discusses the causes of Earth's seasons.
Video is intended for students taking astronomy at Westchester Community College. The video is unpolished, except for some audio tweaking.
The Seasons simulator is from Kevin Lee's Astronomy Education page at the University of Nebraska - Lincoln:
astro.unl.edu/classaction/anim...
"Lecture Tutorials for Introductory Astronomy" by Prather, et al published by Pearson Higher Ed:
www.pearsonhighered.com/educat...

[@utsmanjunath]

Excellent presentation....

[@xLeLe82x]

Very well explained!

[@maxisjaisi400]

In the seasons simulator, why doesn't the ecliptic change when we change the month? I'm assuming it's showing the effect of sunlight keeping the time of the day fixed. But in the other simulation (sun's motion), if we change the month (keeping the time of the day fixed), the ecliptic changes.