On Saturday, February 16, 2019 at 12:48:08 AM UTC, corvastro wrote:
On Monday, February 11, 2019 at 1:14:07 PM UTC-8, Gerald Kelleher wrote:
https://www.youtube.com/watch?v=2qtyS38Zkzs

http://www.aerith.net/comet/weekly/20100710n.html

Another remarkable feature is the brightening of comets as they approach the central Sun with perhaps the brightening around the 21st January being the best of that year.

https://www.youtube.com/watch?v=2A-neEvX8Jw

Identifying comets on a celestial sphere is perhaps enjoyable in its own way and seems to have a large following, however, to see the inner solar system and all the dynamics going on is far more satisfying for those who can make the adjustment.

Again, low hanging fruit for the first people to make correct judgments from orbital perspectives minus daily rotational effects.

I see nothing advantageous with observing the prograde/retrograde motion of the inner planets as opposed to observing the same motions of the outer planets - except that they occur more frequently for the inner planets.

How cute !, a newbie in this newsgroup is as rare as a supernova. The general run of things is that newbies don't hang around but others come and go while exercising their higher reasoning which comes with this type of astronomy.

To be fair to you, the original Sun-centred astronomers thought that the faster moving Venus and Mercury also demonstrated illusory loops like the slower moving planets and their wider circumferences -

"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. This is acutely demonstrated by Copernicus " Galileo 1632

Their reckoning for all direct/retrograde motions used the Ptolemaic system where the Sun moves through the constellations -

http://community.dur.ac.uk/john.luce...n_ecliptic.gif


In this 21st century scheme, the Sun stays central and stationary while the stars change position to the Sun as a function of our planet's orbital motion like right now -

https://sohowww.nascom.nasa.gov/data...current_c3.gif


Once this framework is constructed, then the planets can be seen to travel in smaller loops (compared to the Earth's wider circumference) around the Sun with the phases and size increases orchestrating a supplementary narrative.

As always, I am eager to promote what this new astronomy can do, for instance the SOHO/LASCO satellite omits any influence of daily rotation and roughly travels with the orbital motion of the Earth. Some get these things while others are content to remain stuck in a celestial sphere monstrosity of a 'clockwork solar system' along with the empirical voodoo merchants but their time has come and gone.