I've already answered this once and my wife called about something and I forgot to click 'Submit Reply.'
(She's forgiven!)
Thanks to all who have responded to my question. I did understand libration and have a good working knowledge of Lat and Long. But I am grateful for the time and effort in making sure that I was aware of the phenomenom jjjnettie. And to WhiteStarLine (another seafarer?) I tried the link but all that I got was a blank page so I will try again but thanks for the effort.
I have mulled over the input and my own analogy with the hammer thrower and when Trevor explained the relationship with Pluto and Charon I can see that what I was looking down the barrel at was a type of geostationary satellite. And now the mud is clearing. ('At last!' they gasp.)
I was trying to picture the moon rotating on its axis in time with the earth rotating on its axis something like a roller brush on a sphere. Yes! Some mothers do have 'em!
Thank you for the references, Trevor. When I searched the State Library I looked for subjects on the moon only and could find nothing more that childrens books and novels. I have 'The Idiots Guide to the Sun' (about my level)
as I wanted that when my wife bought me the PST. And I was looking for a similar 'text.' No doubt these will be for reference only so I will have to have them sent up from Hobart I suppose and read them in the local library. St Helens is not a huge place. We don't even have a roundabout here - but its really nice and quiet for us retirees!
I donated all of my Uni texts to the WA library and it would be nice if more people did that so that more reference books could be available to the general public.
Cheers!
Bert