Definitions for platonic year
pla·ton·ic year

Princeton's WordNetRate this definition:0.0 / 0 votes

1. great year, Platonic yearnoun

   time required for one complete cycle of the precession of the equinoxes, about 25,800 years

WikipediaRate this definition:0.0 / 0 votes

1. platonic year

   The term Great Year has more than one major meaning. It is defined by scientific astronomy as "The period of one complete cycle of the equinoxes around the ecliptic, or about 25,800 years". Ptolemy reported that his teacher Hipparchus, by comparing the position of the vernal equinox against the fixed stars in his time and in earlier observations, discovered that it shifts westward approximately one degree every 72 years. Thus the time it would take the equinox to make a complete revolution through all the zodiac constellations and return to its original position would be approximately 25,920 years. In the heliocentric model, the precession can be pictured as the axis of the Earth's rotation making a slow revolution around the normal to the plane of the ecliptic. The position of the Earth's axis in the northern night sky currently almost aligns with the star Polaris, the North Star. But as the direction of the axis is changing, this is a passing coincidence which was not always so and will not be so again until a Great Year has passed. The Platonic Year, which is also called the Great Year, has a different more ancient and mystical meaning. Plato hypothesized that winding the orbital motions of the Sun, Moon and naked eye planets forward or back in time would arrive at a point where they are in the same positions as they are today. He called this time period the Great Year and suggested that such a unified return would take place about every 36,000 years. By extension, the term "Great Year" can be used for any concept of eternal return in the world's mythologies or philosophies. Historian Otto Neugebauer writes: The difficulty with the term "great year" lies in its ambiguity. Almost any period can be found sometime or somewhere honored with this name.

ChatGPTRate this definition:0.0 / 0 votes

1. platonic year

   A platonic year, also known as a Great Year or an Equinoctial Cycle, is the period of time required for the precession of equinoxes to complete a full cycle and return to its starting point. This astronomical concept is related to the earth's slow wobble on its axis, which gradually shifts the position of the celestial sphere over time. The time frame is debated, but it is typically estimated to be around 25,772 years.

The Nuttall EncyclopediaRate this definition:0.0 / 0 votes

1. Platonic Year

   a period of 26,000 years, denoting the time of a complete revolution of the equinox.

Matched Categories

1. • Time Period

How to pronounce platonic year?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say platonic year in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of platonic year in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of platonic year in Pythagorean Numerology is: 4

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=platonic year
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Platonic_Year
3. ^ ChatGPT
   https://chat.openai.com
4. ^ The Nuttall Encyclopedia
   https://www.gutenberg.org/cache/epub/12342/pg12342-images.html#PlatonicYear