It's called an analemma, and I'd made one myself - easy enough to do...
But is s7 doesn't believe it, it can't be true....
But is s7 doesn't believe it, it can't be true....
Well blow me down, you aren't dreaming! 🙂
Noon - Wikipedia
High Noon by the Sun isn't the same thing as Clock time of 12.00! 😕
Something to do with the equinoxes and the tilt of the Earth...
The error can be 16 minutes, but it works on 4 days of the year. December 21 being one of them. Probably caused shipwrecks in the old days of navigating by the sun and clocks. But where have we seen that date recently?
Spooky coincidence. Ewww.. Weirdness! 😱
Noon - Wikipedia
High Noon by the Sun isn't the same thing as Clock time of 12.00! 😕
Something to do with the equinoxes and the tilt of the Earth...
The error can be 16 minutes, but it works on 4 days of the year. December 21 being one of them. Probably caused shipwrecks in the old days of navigating by the sun and clocks. But where have we seen that date recently?
Spooky coincidence. Ewww.. Weirdness! 😱
Yes, the Sun's altitude at noon varies throughout the year and moves slightly east and west.
This means that simple sundials do not agree with 'clock time'.
The attachment shows how the gnomon of a sundial casts its shadow thoughout the year.
No doubt gpauk used this shadow method to construct his analemma.
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I wander [SP] if he ever sang this song.
Dion - The Wanderer - HD - Video - Stereo Sound . - YouTube
Sir Patrick may have played it on his xylophone! Patrick Moore plays the xylophone | Hudson & Halls | BBC1 26/11/1990 - YouTube
Apart from being a mean xylophonist, Sir Patrick was also an avid composer, with three operas and 70 marches and waltzes to his name! 😎
Dear old Patrick.
This has been quite an interesting diversion. Kept me awake last night thinking about the spherical co-ordinates of quantum mechanics versus distance or spatial co-ordinates like x, y, z which tend to go with classical mechanics.
Physics is terrifically stuck right now. We need what is called a "Paradigm Shift" to understand things.
Very fledgling idea here, but maybe we should abandon distance measurement with metre rulers and such? 😎
Take any old planet:
I want to locate the North Pole at 0 in Radians. The equator is Pi/2. Logically I ought to call the South Pole Pi. Minus Zero for the South Pole causes problems. As we all know Exp (j x Pi) = -1.
j being the Engineer's notation for complex number i.
Where I have got to so far, is we only need angles and a clock to locate everything. No rulers needed at all! The Moon is just over a second away, not a distance. See the beauty of it? Spin is everything in this Universe. I think we are getting into Quaternions here.
It's years since I did difficult Integrals by substitution of variables, but the broad idea was you turned a Spatial problem into a Rotation problem, using complex numbers. I was good at them. Well see how it goes after sleeping further on it. 😀
This has been quite an interesting diversion. Kept me awake last night thinking about the spherical co-ordinates of quantum mechanics versus distance or spatial co-ordinates like x, y, z which tend to go with classical mechanics.
Physics is terrifically stuck right now. We need what is called a "Paradigm Shift" to understand things.
Very fledgling idea here, but maybe we should abandon distance measurement with metre rulers and such? 😎
Take any old planet:
I want to locate the North Pole at 0 in Radians. The equator is Pi/2. Logically I ought to call the South Pole Pi. Minus Zero for the South Pole causes problems. As we all know Exp (j x Pi) = -1.
j being the Engineer's notation for complex number i.
Where I have got to so far, is we only need angles and a clock to locate everything. No rulers needed at all! The Moon is just over a second away, not a distance. See the beauty of it? Spin is everything in this Universe. I think we are getting into Quaternions here.
It's years since I did difficult Integrals by substitution of variables, but the broad idea was you turned a Spatial problem into a Rotation problem, using complex numbers. I was good at them. Well see how it goes after sleeping further on it. 😀
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oh no, not Quaternions
I would recommend Grassman/Clifford "Geometric Algebra" to anyone considering Quaternions
Daivd Hestenes has been very active in reviving and popularizing Geometric Algebra in recent decades, with quite a few others now using the formalism from computer graphics to physics
I would recommend Grassman/Clifford "Geometric Algebra" to anyone considering Quaternions
Daivd Hestenes has been very active in reviving and popularizing Geometric Algebra in recent decades, with quite a few others now using the formalism from computer graphics to physics
I'm sure it will all become clearer after 'The Bells', Steve!
In line with Scottish superstition, I've paid off all my debts before the bells sound out, thus ensuring 2021 is not filled with misfortune!
It's just a pity that, this Hogmanay, there will be no 'First Foot' to share a drink with me and begin the new year with good luck.
A GUID NEW YEAR TAE ANE AN' A'!
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Not many people know this, but Mainland Europe's favourite New Year's Eve Comedy Show at 6PM on New Years Eve is:
Dinner for One.
Incredibly funny. Posh Miss Sophie's entrirely disregards Reality. All her old boyfriends are dead. But she continues to deny reality.
Poor old Butler James has to continue to keep the Charade going. 🙄
You don't have to understand language to get what is hilarious about this.
"The same procedure as EVERY year, James!"
Happy New Year, my friends. Just hang on. 😎
Dinner for One.
Incredibly funny. Posh Miss Sophie's entrirely disregards Reality. All her old boyfriends are dead. But she continues to deny reality.
Poor old Butler James has to continue to keep the Charade going. 🙄
You don't have to understand language to get what is hilarious about this.
"The same procedure as EVERY year, James!"
Happy New Year, my friends. Just hang on. 😎
The whole of Portsmouth holding its head in its hands this morning.... 🙁
We are all either deeply hungover or still drunk from last night. 😱
At midnight bangers and rockets went off. Some distant exiled relative of Scotsman Galu decided to play "Scotland the Brave!" on the baggies. Which, TBH, is a better tune than "Play up Pompey!"
All terrific fun.
ANYHOO, I have been further investigating this strange anomaly in the Universe:
16 minutes turns out to be a 16 Nautical miles. Nautical mile - Wikipedia.
Should we care? I think so. It's a matter of life and death if you are on a ship on a dark and stormy night and want to avoid the rocks. 😀
BTW, my new theory of the Universe is coming on. I have decided to call the North Pole (0,-0). Progress. 😎
We are all either deeply hungover or still drunk from last night. 😱
At midnight bangers and rockets went off. Some distant exiled relative of Scotsman Galu decided to play "Scotland the Brave!" on the baggies. Which, TBH, is a better tune than "Play up Pompey!"
All terrific fun.
ANYHOO, I have been further investigating this strange anomaly in the Universe:
16 minutes turns out to be a 16 Nautical miles. Nautical mile - Wikipedia.
Should we care? I think so. It's a matter of life and death if you are on a ship on a dark and stormy night and want to avoid the rocks. 😀
BTW, my new theory of the Universe is coming on. I have decided to call the North Pole (0,-0). Progress. 😎
Small change: Yes
Slow drift: No.
I think the drift is instant because one can determine the axis only from the actual masses distribution. There no time lag, when a mass moves, the axis moves accordingly.
Can one check on this, in the frame of classical mechanics. I think, the rotation axis of inertia only depends of the masses distribution, time doesn't come in.
mchambin,
Physical occurrences are instantaneous and continuos but a petite force impacting an immense mass doesn`t cause a sudden shift.
Physical occurrences are instantaneous and continuos but a petite force impacting an immense mass doesn`t cause a sudden shift.
That is, what intuition says, but it is wrong.
Hint: An axis is immaterial, it has no mass. It has no physical existence but a mathematical definition.
Hint: An axis is immaterial, it has no mass. It has no physical existence but a mathematical definition.
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