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Eclipse for 21st century observers
Gerald Kelleher wrote:
On Saturday, July 15, 2017 at 1:09:42 PM UTC+1, Mike Collins wrote: Gerald Kelleher wrote: On Saturday, July 15, 2017 at 7:55:18 AM UTC+1, wrote: On Saturday, July 15, 2017 at 7:01:25 AM UTC+1, Gerald Kelleher wrote: Although Uranus would appear to move against the background stars at a rate of 4 degrees every year, from the rapidly moving Uranus with its 88 day orbital period, there would be no discernible retrograde motion of Uranus seen from Mercury. This is too stupid even for you, Gerald. Oops, you got me on that one, I meant the rapidly moving Mercury would not discern any appreciate backward motion of Uranus as it is simply moving so fast with each orbital pass of the outer planet and Uranus is moving so slow. Then again, reading the passage correctly, it would easily have been seen to be a typo of sorts. http://www.theplanetstoday.com/# From what I see, Mercury may be barely discernible when the solar eclipse occurs as seen from Earth as retrogrades of the inner planets rely on a different perspective, much like the satellites of Jupiter. Instead of attacking me it would be more productive if people simply called out as many insights of their own if they got into the spirit of this type of astronomy. I see you're still using your favourite astrology site. Every time you look at this you can be reminded of this truth of Newton's statement as you look at the top diagram with its viewpoint "above" the sun and can see that from the sun there are no retrogrades. First things first,the website is brilliant and rather than disparage that it is as an astrological website as I always knew it was, there is nothing out there comparable to it for all the fuss about an information age. Guess how they do the calculations. Newton wins again. Retrogrades are merely how we see the motions of the planets from our planet or indeed any other planet using the background stars as a gauge. If I extended it out further to the 165 year orbit of Neptune that represents a 2 degree movement against the background stars for each Earth orbit then the results would be even clearer. Mercury with an orbital period of 88 days would register no observed retrograde motion due to the relative speeds of both planets yet the outer planet would move 2 degrees against the background stars for roughly 4 orbits of Mercury. Nice to see that you've finally realised that from the viewpoint of the sun there are no retrogrades. Just look at the diagram or the solar system on your astrology website to confirm this. You poor folk never get tired of dithering around when the imaging language of astronomy is fairly straightforward and above the failures of one individual in the late 17th century. In little over a month the inner planets should be seen with the central Sun in the same image with its glare conveniently subdued by our own moon. http://www.zam.fme.vutbr.cz/~druck/e...Tse1997uw2.png I simply can't imagine a dour existence before all that is great in modern technology which allows to images to circulate and despite the experience that there isn't the slightest interest in interpretative astronomy, it still stands that your poor creatures are willing to stick with an identification exercise within a celestial sphere framework. There isn't more than a little light entertainment to be gleaned from somebody steadily misinterpreting everything the wonders is modern science and Newtonian space flight show us. You have to realise that your constant "discoveries" of spurious and impossible explanations of things which have been known and explained for decades/centuries is just a type of freak show. |
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