Nature of The Absolute Horizon
The definition of an absolute horizon is sometimes referred to as teleological, meaning that it cannot be known where the absolute horizon is without knowing the entire evolution of the universe, including the future. This is both an advantage and a disadvantage. The advantage is that this notion of a horizon is very geometrical, and does not depend on the observer, unlike apparent horizons, for example. The disadvantage is that it requires the full history (all the way into the future) of the spacetime to be known. In the case of numerical relativity, where a spacetime is simply being evolved into the future, only a finite portion of the spacetime can be known.
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Famous quotes containing the words nature of the, nature of, nature, absolute and/or horizon:
“Religion. A daughter of Hope and Fear, explaining to Ignorance the nature of the Unknowable.”
—Ambrose Bierce (1842–1914)
“As the quality of water changes with the nature of the soil;
So will a man’s reason vary with the quality of his friends.”
—Tiruvalluvar (c. 5th century A.D.)
“If only nature is real and if, in nature, only desire and destruction are legitimate, then, in that all humanity does not suffice to assuage the thirst for blood, the path of destruction must lead to universal annihilation.”
—Albert Camus (1913–1960)
“The central paradox of motherhood is that while our children become the absolute center of our lives, they must also push us back out in the world.... But motherhood that can narrow our lives can also broaden them. It can make us focus intensely on the moment and invest heavily in the future.”
—Ellen Goodman (20th century)
“The horizon is more than a convention of landscape painting, less than truth.”
—Mason Cooley (b. 1927)