Golden number - AbsoluteAstronomy.com

Golden number may mean:

Golden number (time), a number assigned to a calendar year denoting its place in a Metonic cycle
Golden ratio
Golden ratio
In mathematics and the arts, two quantities are in the golden ratio if the ratio of the sum of the quantities to the larger quantity is equal to the ratio of the larger quantity to the smaller one. The golden ratio is an irrational mathematical constant, approximately 1.61803398874989...

, an irrational mathematical constant with special properties in arts and mathematics

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