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tech / sci.astro.amateur / Re: Jupiter in direct motion

SubjectAuthor
* Jupiter in direct motionGerald Kelleher
`- Re: Jupiter in direct motionGerald Kelleher

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Jupiter in direct motion

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Subject: Jupiter in direct motion
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 by: Gerald Kelleher - Sun, 2 Apr 2023 17:20 UTC

Jupiter is presently transitioning from a twilight to dawn appearance as it changes position from left to right of the Sun-

https://sol24.net/data/html/SOHO/C3/96H/VIDEO/

Jupiter's actual motion is from right to left gauged against the background stars but unlike Mercury which recently transitioned to an evening appearance in its motion from right to left, Jupiter moves slower than the Earth it will be seen changing position with the stars as a reflection of the Earth's own motion.

The framework which permits today's observers to put the motions of the planets in the context of a central Sun is the same one by which the 365/366-day calendar system is constructed which in turn provides the basis for the Ptolemaic system on which Copernicus based his hypothesis for a moving Earth in a Sun-centred system. The framework was unknown to Copernicus and Galileo and resolves an issue that nobody could at the time of the Galileo affair.

Re: Jupiter in direct motion

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Subject: Re: Jupiter in direct motion
From: kelleher...@gmail.com (Gerald Kelleher)
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 by: Gerald Kelleher - Mon, 3 Apr 2023 19:27 UTC

Familiarity with the planets as they come and go behind the Sun becomes a labour of love as the satellite keeps an eye on the central Sun while the planets display their own characteristics depending on their size, luminosity, distance from the Earth, the unique diffraction spikes and lots of other identifiable traits.

https://www.youtube.com/watch?v=CV4Hj3PsBnI

It is easy to spot Mars as it is the slowest moving from left to right while Venus, as it passes between the Earth and the central Sun is brightest around the end of October and into November. Mercury dims as it approaches the Sun while Venus remains fairly steady as do the rest of the planets.

A pure privilege to have the satellite with a limited time span while everyone else does nothing.


tech / sci.astro.amateur / Re: Jupiter in direct motion

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