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Old May 21st 18, 01:55 PM posted to sci.astro.amateur
Gerald Kelleher
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Default Illusory loops vs actual loops.

https://apod.nasa.gov/apod/ap060110.html

Even though it is no surprise that nobody else seems to enjoy the spectacle where Venus shows those familiar size increasesbut the phase component negates the increase in luminosity to a large degree, Galileo marveled at this component seen from a slower moving Earth -

"But the telescope plainly shows us its horns to be as bounded and distinct as those of the moon, and they are seen to belong to a very large circle, in a ratio almost forty times as great as the same disc when it is beyond the sun, toward the end of its morning appearances.

SAGR. 0 Nicholas Copernicus, what a pleasure it would have been for you to see this part of your system confirmed by so clear an experiment!

SALV. Yes, but how much less would his sublime intellect be celebrated among the learned! For as I said before, we may see that with reason as his guide he resolutely continued to affirm what sensible experience seemed to contradict. I cannot get over my amazement that he was constantly willing to persist in saying that Venus might go around the sun and be more than six times as far from us at one time than at other times as at another, and still look always equal, when it should have appeared forty times larger." Galileo

http://www.masil-astro-imaging.com/S...age%20flat.jpg


Celebrated among the learned indeed !, the learned have long since departed this world in astronomical matters for how else to account for the resolution of direct/retrograde motions by illusory loops for the slower moving planets further from the Sun than the Earth as opposed to the faster moving Venus and Mercury.