On Friday, October 27, 2017 at 12:36:46 AM UTC+1, palsing wrote:
On Thursday, October 26, 2017 at 12:16:38 AM UTC-7, Gerald Kelleher wrote:

It is good that you marvel today at imaging Paul because a few years ago it was somewhat different -

https://lh3.googleusercontent.com/-T...015%2Beng..jpg

Gerald... you don't actually think that you have referenced a photo here, do you? I shudder while waiting for your response...


It is a simple sequence of images that tells half the story of the motions of Venus with an accompanying table of the dates when the images were taken..


You already know that Venus and Mercury are seen to run their circuits from a slower moving Earth therefore the perspectives change for the slower moving Mars,Jupiter and Saturn seen from a faster moving Earth.

So don't be depressed, you were among the first to see the partitioning of perspectives and how to account for a moving Earth, a central Sun and the change in relationship between an evening and morning appearance of the background stars as the Earth runs its circuit of the Sun.

No, Gerald, I was definitely NOT among the first to know about these things, several centuries have elapsed since these motions were first understood. Just because you think that you were the first to recognize this material does not mean you were, you were simply late to the party.


Knowing that even you enjoy the partitioning of perspectives is satisfaction enough for me. The original Sun centered astronomers (including Galileo who first put the size and phases of Venus in correct context) were working off a framework where direct/retrograde motion were common to all planets but the solutions for slower moving and faster moving planets depending on what planet you are standing on -

"Now what is said here of Jupiter is to be understood of Saturn and Mars also. In Saturn these retrogressions are somewhat more frequent than in Jupiter, because its motion is slower than Jupiter's, so that the Earth overtakes it in a shorter time. In Mars they are rarer, its motion being faster than that of Jupiter, so that the Earth spends more time in catching up with it. Next, as to Venus and Mercury, whose circles are included within that of the Earth, stoppings and retrograde motions appear in them also, due not to any motion that really exists in them, but to the annual motion of the Earth." Galileo






Don't be depressed, there are still lots and lots of facts about astronomy left for you to learn... if only you were a just little more capable of learning anything at all. You have SO much of it wrong now, it would take a long time just for you to un-learn what you think you know now, years and years, I'm guessing.


You enjoyed the sequence of images showing the trajectory of Venus to the left of the Sun as it swings out from behind the Sun to its widest point before swinging back in front of the Sun (direct/retrograde in geocentric terms) so the other half of the story is a morning appearance that precedes the appearance of the Sun where Venus shows itself to the right of the Sun.

http://www.popastro.com/images/plane...ary%202012.jpg


I know you are sincere and confident of your vast knowledge, but that is no substitute for the reality of it all.

Venus and Mercury are unique in this case so what you do is add the Mars,Jupiter,Saturn and the rest to this scheme. Then you add the background stars and a complete narrative emerges.

Go ahead and try it as I left the slower moving planets (seen from a faster moving Earth) more or less unexplained using the left/right, evening/morning appearance scheme. Who will be the first in human history to distinguish the faster moving and slower moving planets this way ?.