On Friday, April 1, 2016 at 8:47:02 AM UTC-7, Mike Collins wrote:
oriel36 wrote:
On Friday, April 1, 2016 at 3:41:10 PM UTC+1, wrote:
On Friday, April 1, 2016 at 3:26:16 PM UTC+1, oriel36 wrote:

The lunar day/night cycle is a consequence of the moon's motion around the Earth

Yes, it has "dual surface rotations" - it goes around the Earth once a
month, and during that orbit, it spins once on its axis, causing the Sun
to rise and set once per month.

You can't expect me to equate the lunar orbital motion around the Earth
as 'rotation' because this is descending to an uncomfortable intellectual
level no matter how many times I see it.

A simple analogy of walking around an object with an outstretched arm
imitating the moon's orbital motion of the Earth should be enough for
anyone as to why we see the same side of the round moon but I went way
beyond this analogy by showing where Newton was getting his 'moon
rotation' from by a misreading of revolution for orbital motion via Kepler.

Orbital motion is where all parts of the planet travel through space at
the same speed, daily rotation on the other hand has a maximum equatorial
speed diminishing to zero at the polar latitudes. This is why the poles
turn to the central Sun and act as a window into the orbital behavior of the Earth.

The dynamical cause for the variations in the natural noon cycle are the
same globally for this reason but this insight is way,way ahead of people
who have trouble associating sunrise and sunset with planetary rotation.





Here's another video for you:



http://youtu.be/9Ml4_Jv_HkE

Terrific video... I learned something I didn't know, always a joy.

\Paul A