Equation of Time Cam

I posted 2 times in 2021

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#time - 2 posts

#equation of time - 1 posts

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#equation of time

My Top Posts in 2021

#2

October 14, 2020  · We are excited to announce the speakers for Long Now Member Ignite Talks 02020! Welcome our Members and speakers.  Catherine Chalmers: Collaborating with Insects;  Allison Cooper: Activism as Futurism: Imagining Better Worlds; Danese Cooper: Change Agents (and How to Become One);  Jason Crawford: Instant stone (just add water!)  Stewart Dickson: Plastic Mathematics in the Clock;  Michael Garfield: Deepfakes & The Archaic Revival;  Quentin Hardy: The Great Dead End;  Asmara Marek: The Future of Storytelling;  Louis Metzger: Our future drugs will come from the oceans; Can we save them in time?;;Marc Pomerleau: Leways: The Story of a Chinatown Pool Hall;  Patricia Ravasio: Lost Visions of the Leonardo da Vinci of the 20th Century;  Madeline Sunley: Art and Time: Axial Precession, archaeoastronomy, and marking a desert nuclear waste site for the next ten millennia;  Scott Thrift: A Longer Now

https://www.facebook.com/longnow/videos/398725587793659

0 notes • Posted 2021-04-14 21:33:31 GMT

#1

864 notes • Posted 2021-04-14 21:26:12 GMT

October 14, 2020  · We are excited to announce the speakers for Long Now Member Ignite Talks 02020! Welcome our Members and speakers.  Catherine Chalmers: Collaborating with Insects;  Allison Cooper: Activism as Futurism: Imagining Better Worlds; Danese Cooper: Change Agents (and How to Become One);  Jason Crawford: Instant stone (just add water!)  Stewart Dickson: Plastic Mathematics in the Clock;  Michael Garfield: Deepfakes & The Archaic Revival;  Quentin Hardy: The Great Dead End;  Asmara Marek: The Future of Storytelling;  Louis Metzger: Our future drugs will come from the oceans; Can we save them in time?;;Marc Pomerleau: Leways: The Story of a Chinatown Pool Hall;  Patricia Ravasio: Lost Visions of the Leonardo da Vinci of the 20th Century;  Madeline Sunley: Art and Time: Axial Precession, archaeoastronomy, and marking a desert nuclear waste site for the next ten millennia;  Scott Thrift: A Longer Now

http://demonstrations.wolfram.com/Analemmas/

http://demonstrations.wolfram.com/SolarPositionChartInPolarCoordinates/

http://demonstrations.wolfram.com/SolarPositionChartInCartesianCoordinates/

The Clock of the Long Now is a proposed cultural monument, designed to keep local, absolute and astronomical time over a span of 10,000 years.

Original link:

https://web.archive.org/web/20120103070908/http://emsh.calarts.edu/~mathart/Clock_Cam.html

The Equation of Time is a function which can convert from local solar time to absolute time.  It accounts for the elliptical eccentricities in the orbit of the Earth about the Sun and the tilt of the Earth's axis, which result in variations in the Sun's apparent rate of travel along the Ecliptic -- the position of the Sun in the sky at absolute noon, over the span of a year.

This is the Equation of Time plotted over the year 2000. The local maxima and minima are aspects of the graph which shift with the Precession of the Equinoxes over a period of about 26,000 years.

The is the cylindrical Mathematica plot of the Equation of Time converted into a CAD object for output via a 3-D Rapid Prototyping printer. Stewart Dickson did this CAD work.

The time-keeping element of the Clock is a mechanical computer -- the World's Slowest Computer -- designed by W. Daniel Hillis and the Long Now Foundation.

For more information, see:

The Clock of the Long Now: Time and Responsibility by Stewart Brand, Basic Books, New York, 1999

http://demonstrations.wolfram.com/VariationOfTheEquationOfTimeWithThePrecessionOfTheEquinoxes/