1
Flat Earth Investigations / Re: I am wondering why I do not see...
« on: April 17, 2024, 05:58:16 PM »..Reposts a video already posted in the same thread ...
Why so I have, how embarrassing. Very careless of me, I apologise.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
..Reposts a video already posted in the same thread ...
Quote from: SteelyBobThis is simply incorrect - much like the slinky video people, you are publicly demonstrating a complete lack of understanding of basic physics. There is nothing in Newtonian understandings of gravity or F=MA etc that is at odds with what we observe in freefall, for example.
The above quotes provided by the astrophysicist at space.com and by pitt.edu show the problem with the effect that causes weightlessness - the separation of inertial and gravitational mass and their equivalence. Newtonian Gravity was rejected as incoherent because of this.
After describing the issues with Newtonian Gravity the space.com article goes on to describe Einstein's "Happiest Thought" that a man would not experience his weight in freefall as a sticking point. Einstein also repeated this thought as his basis for his theories and principle on numerous occasions. If this were cleanly explained in Newtonian Gravity and was of no relevance, why would space.com segway to this curiosity of Einstein? Obviously this does matter and the issue here is a matter of understanding and reading comprehension on your part.
You have cited nothing. On this forum you continuously post and cite only yourself as your source.QuoteYou also describe Newtonian gravity as being 'discredited'. That is very unfair on poor old Isaac. His theory has been built on, but it remains an entirely valid model for most of what goes on in our lives - bridges, aircraft, boats, rockets etc are all built using Newtonian physics and ideas of gravity - it works.
Actually those things use Newtonian gravity + the absurd mechanisms like the separation of inertial and gravitational masses that require it to work. It was on basis of this ad-hoc mechanism that the theory was discredited. The theory does not work without those mechanisms and would otherwise make blatantly wrong predictions, as explained by the above space.com article.
A theory that works is a different matter than it being discredited as an incoherent theory. You have a low comprehension of this and are using circular reasoning to justify something that has been discredited.
What's the point of this? Did the video get cut short before explaining something – if so, please repost it? Apart from the Glaswegian "eloquence" at the beginning, what I saw was mostly pretty coloured graphics with a musical background.
That's interesting that it went over your head. May I ask what your beliefs are regarding Earth and gravity?
Gravity:
What you say is almost true and in the spirit of what I am saying. But there are no straight lines on a globe. They are all curves. So i walk 1.57 miles from the north pole heading due south to the north pole. The line I have walked is a curve although it will look straight if looking from above and it will feel straight to me. It is a curve. And when i have travelled that 1.57 miles curve my rate of drop in height will be 1 mile (for each 1.57 miles).
I have revised the image to hopefully better explain this.
Instead of walking from N to E1 imagine walking from N to X. This is half the distance to the equator and represents one eighth (1/8) of the earths circumference ie 3,113 miles. Can we agree on this?
If so the drop/fall/decrease in height in relation to the north pole (call it whatever) will be equal to 1,982 miles ie one half (1/2) the radius of the earth. Can we agree on this?
If either of the above figures are incorrect please tell me how?
Accepting the above if we divide 3,113 miles by 1,982 miles we get a drop/fall/decrease in height in relation to the north pole of 1 mile per 1.57 miles travelled.
Like it or not and forget what I have called these dimensions does anyone disagree with these maths?
Hopefully not. And regardless of what others have said every single infinite point on a circle is at the 'top of the curve'. Above that point the circle curves away as does it below that point wherever that point is on the circle. And as a circle is one continuous curve there are no parts of the curve that are any different to other part. Take any two segments of the curve and they will be identical no matter where on the circle they came from.
Now instead of me walking 3,113 miles I am going to divide the circle into 360 (purely for conventional purposes - I could have chosen any figure to divide it by; 100, 125, 299 - it wouldn't make any difference). The circumference of the earth divided by 360 = 69 miles. I am now going to walk that 69 miles from the north pole. And when I have finished I will be at a point on the circle some 43 miles below the north pole. Forget linear dimensions they don't matter. The fact is I will have dropped by roughly 43 miles. Or to make it simpler 1 mile for every 1.57 miles travelled around the circumference. And if someone stood at the north pole and watched me walk 1.57 miles away from them I should be at a point 1 mile below them. These figures are irrefutable. Its down to the wording. If anyone disagrees can you please do so in layman's terms? Many thanks
Latitude and Longitude are references ultimately based on astronomical phenomena. The Latitude is based on the angle of the North Star in the sky (for the NH) and Longitude is related to clocks and time zones. You might know your Lat/Lon coordinate point, but this would do nothing to show the distance between those points. This is how GPS, and formally the land-based LORAN, operate. The station knows its own coordinates and it is giving you your own coordinates based on triangulation.
For long distance measurements in the 17th century and prior the first step was to get your longitude and latitude. From that you could know how far away another place with a known latitude and longitude was if you knew how many miles a degree took upon the earth. It was "known" how many miles a degree took upon the earth based on a study, to which they would take and apply to Lat/Lon coordinates on a theoretical basis. They were not stringing ruler tape or chains for all long distance work. Long distance 'measurement' worked, and still works, based on a series of assumptions.
Finite is adjacent to infinite.
Chapters 1 & 2I find it amusing that you fail to point to a direct reference to Ptolemy when laying claim as to what he believed, instead relying on the hearsay of others "to speak the truth," "you can trust us, this is what Ptolemy believed."
After describing triangulation, as used by surveyors and on which the author is particularly keen, he introduces the astronomers Hipparchus of Nicaea, Claudius Ptolemy of Alexandria, Nicolas Copernicus, Tycho Brahe, Johannes Kepler and Galileo Galilei. As astronomers, their opinions and theories formed the standard views of astronomy in their times and Copernicus and Kepler especially laid the foundations of modern astronomy, but the author believes they all made a fundamental mistake: beginning at Hipparchus they all held that “the heavenly bodies (the stars) are infinitely distant.” (page 3)
The author never says where this saying is recorded; he only insists it was Hipparchus’s conviction and that the others accepted it at face value. We can’t check Hipparchus’s own writings, they’re lost; we mostly know them from Ptolemy. So, if Ptolemy, author of the standard text on geocentric astronomy used for 1400 years (the famous Almagest), built his theory of the universe while accepting this, you’d expect to find it in his writings, but you’d be disappointed – the Almagest doesn’t mention it. In fact, Ptolemy claims the stars are just beyond the orbit of Saturn, 20,000 earth radii from Earth (from Ptolemy’s Planetary Hypotheses, Hamm, 2011, p202).
Nah, doesn't fly.
Yet when Hickson claims a direct quote of Hipparchus (i.e., "the heavenly bodies are infinitely distant," you offer nothing more than a statement a direct quote of Hipparchus or his work would be impossible, because we cannot check Hipparchus' writings.
You know you do not have access to them.
That's all.
Spare us the rest of the writing as it is rendered totally useless by this demonstration of your bias.
This demonstration indicates an inability to assess the printed material on a toothpaste tube, let alone a written work by a scientist.
Therefore, the greatest distance of Saturn, which is adjacent to the sphere of the fixed stars, is 19,865 earth radii, and its least distance is 14,187 earth radii.
…
If all the diameters subtended the same apparent angle at their mean distances, the ratio of one diameter to another would equal the ratio of their distances, because the ratio of the circumferences of circles, as well as of similar arcs, one to another, is equal to the ratio of their radii. In the measure in which the diameter of the Sun is 1,210, the diameter of the Moon is 48; the diameter of Mercury 115 the diameter of Venus 622½; the diameter of Mars 5,040; the diameter of Jupiter 11,504; and the diameter of Saturn 17,026. The diameter of the first magnitude stars in this measure, assuming that their (sphere) is adjacent to the furthest distance of Saturn, is 19,865, or about 20,000; and the amount is surely not less than 20,000. But the diameters do not subtend equal angles, for the diameter of the Moon subtends an angle 1 1/3 times that of the Sun, and the diameters of the planets subtend angles smaller than the Sun in the ratios mentioned. It is clear that in the measure where the diameter of the Sun is 1,210, the diameter of the Moon is 64 because it is 1⅓ times 48; the diameter of Mercury is 8 because it is about 1/15 of 115; the diameter of Venus is 62 which is about of 622½; the diameter of Mars is 252 which is 1/20 of 5,040; the diameter of Jupiter is 959 which is about 1/12 of 11,504; the diameter of Saturn is 946 which is about 1/18 of 17,026; the diameters of the first magnitude stars is 1,000 which is 1/20 of 20,000, and they are certainly not smaller.
Planetary Hypotheses Book 1, part 2 by Claudius Ptolemy
Yes, sources were also provided showing that Hipparchus believed in an infinitely distant sun. If he treated the sun as infinitely distant it is difficult to argue that he never treated he stars as infinitely distant.
Your argument is that you do not personally believe that Hipparchus believed in infinitely distant stars, and do not actually have a source on that except for your own opinion, which is a poor argument to say the least.
Incorrect, Longitude clearly argues that Hipparchus believed in a small universe like Ptolemy. He states at the end of his second post: -
" Instead of astronomers originally thinking the stars were infinitely distant or unthinkingly accepting the opinion of their predecessors, the impression from reading their works is a growing understanding of how much bigger they each realise the universe is than previously thought; "
He suggests that astronomers did not originally think the stars were infinitely distant and eventually realized that it was enormous. This is clearly wrong.
You could have just googled it instead of writing us an essay about how you don't think Hipparchus believed in infinitely distant stars.
https://www.quora.com/What-is-open-space-in-outer-space
Aristarchus believed that the stars were infinitely distant too:
https://books.google.com/books?id=LE1HDwAAQBAJ&newbks=1&newbks_redir=0&lpg=PT78&pg=PT78#v=onepage&f=false