We all know that 66.66 agnle is main reason that we have winter and summer
below You tube = new Discovery explain ( Internal Doppler efect for Sun -Earth )
Doppler Efect for Solar System = Winter/Summer
http://youtu.be/s3Q0DuX7-RY
Above Can Be Explain By classical mechanic Equations
author explain how to use Point A what is Point A
http://youtu.be/yExaJ4pH7MU
more details
http://marosz2.blogspot.com/
http://tesla256.blogspot.com/
author Inventor Maciej Marosz : http://tesla4.blogspot.com