If you have a new account but are having problems posting or verifying your account, please email us on [email protected] for help. Thanks :)
Hello All, This is just a friendly reminder to read the Forum Charter where you wish to post before posting in it. :)
Hi all, The AutoSave Draft feature is now disabled across the site. The decision to disable the feature was made via a poll last year. The delay in putting it in place was due to a bug/update issue. This should serve as a reminder to manually save your drafts if you wish to keep them. Thanks, The Boards Team.
Hello all! This is just a quick reminder to ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere.

Galileo's Pamphlet

  • 07-10-2022 11:08am
    Registered Users Posts: 408 ✭✭ Orion402

    It is easily readable for any observational practitioner just like the Commentariolus of Copernicus-

    Galileo quickly created the short treatise after he put two and two together in observing the change in position of Jupiter's satellites, no mean feat given that he had to visually observe changes against the background stars that nobody previously could notice. Galileo did equate the motions of Jupiter's satellites with the motion of Venus and Mercury around the Sun, however, it was not possible to frame the motions of the inner planets using the prevailing Ptolemaic framework in operation among the first heliostatic astronomers at the time.

    The compulsion to get an insight out there is present among those seeing observations for the first time and certainly the back and forth motions of Venus and Mercury using a human satellite free from daily rotational influences had that effect on me as it should others-

    The observational limitations of Galileo's era were mostly arising from being attached to a rotating Earth, so they were forced to use a stationary field of background stars to gauge planetary motions and then try to convert them into a heliocentric framework. It may work for the slower moving planets further from the Sun than the Earth but it doesn't for the faster moving Venus and Mercury-

    "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

    The current modification should be immediately apparent to 21st century observers just as modifications supplied by Galileo and Copernicus resolve outstanding observational issues which may have puzzled previous observers or left them uncomfortable with a less than sufficient solution.


  • Registered Users Posts: 1,361 ✭✭✭ Popoutman

    I thought I had this user on "Ignore", so why do I see this come up?

    Maybe a bugreport is needed to the admins.

    Either way, the listed hypothesis is nothing more than the same shite again, spouted a slightly different way, after being repeatedly told specifically not to do that.

    The poster simply will not stop posting this crap, and it's tiresome to re-read the same disproven hypotheses over and over.

    Can we re-ban them please, asnd save us some mental effort?

  • Registered Users Posts: 408 ✭✭ Orion402

    The moon passed between the Earth and the central Sun today in its monthly circuit of the Earth and nobody, at least in this forum, noticed.

    It happened just as Venus is passing behind the central Sun on the opposite side of the solar system to the slower moving Earth-

    Maybe readers want to ban all observations where objects pass each other out or overtake each other depending on what level the objects are being considered, whether on an Earth/Moon scale with the Sun as a background reference or on a planetary scale where the Sun is a central reference.