Thread: Polar astronomy
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Old March 3rd 18, 09:31 PM posted to sci.astro.amateur
Gerald Kelleher
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Default Polar astronomy

On Saturday, March 3, 2018 at 8:25:15 PM UTC, Anders Eklöf wrote:
Davoud wrote:

Bill:
Haven't you considered how much your choice to not take the time to
organize your topics into complete subjects that you then explain in a
systematic and through way - hurts your agenda?


He's a troll and his agenda is to reel in people like you. I would say
that he has been splendidly successful at fulfilling his agenda.


Reel in to what purpose?

As far as I can tell all he does is to explain what we all already know,
in a way that none of us understands. Quite a feat, really,

--
I recommend Macs to my friends, and Windows machines
to those whom I don't mind billing by the hour


These comments give me a lot of satisfaction as once you are shown how it is done it all becomes common knowledge and easy. The illusory vs actual loops of the planets owes a lot to astrophotographers and animation so have no problem commending others for their efforts -

https://apod.nasa.gov/apod/ap031216.html

VS

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

To account for the Earth's orbital motion in tandem with the loop created by Venus brings a new perspective in where the direct/retrogrades of the inner planets do not occur against a stationary background as the outer direct/retrogrades do. This is because the stars close to the Sun (where the smaller circumferences of Venus and Mercury inhabit) transition from left to right of the Sun as a consequence of the Earth's orbital motion -

https://www.youtube.com/watch?v=MdFrE7hWj0A

This would be for the real astronomical purists.