Rotazione e rivoluzione

Video ROTAZIONE E RIVOLUZIONE

https://www.youtube.com/watch?v=lfh6r1oOB3s

https://www.youtube.com/watch?v=ZFfqAg3ewpY

https://www.youtube.com/watch?v=TpOywo-lNlQ&t=4s

SIMULATORE STAGIONI

http://astro.unl.edu/classaction/animations/coordsmotion/eclipticsimulator.html

http://astro.unl.edu/classaction/animations/coordsmotion/sunsrays.html