On Mar 21, 8:07*am, Mike Collins wrote:

So what you are actually saying is this: Let's ignore the fact that the sun
is visible at both poles on the equinox because it invalidates Oriels
infantile theories

With all due respect to atmospheric refraction and its effects in many
areas,the immense and noble discipline of planetary dynamics focuses
attention of the polar coordinates turning through the circle of
illumination and into their respective orbital cycles of day or
night.While the observers for refraction are many,the audience for the
orbital dynamic are few.

Everything from the annual tidal cycles to the observed variations in
natural noon are contingent on knowing that the polar coordinates act
like a beacon into the orbital behavior of the planet,a particularly
21st century view which incorporates the emerging astronomy of
planetary comparisons.