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, nature, absolute and/or horizon:
“It is the nature of aphoristic thinking to be always in a state of concluding; a bid to have the final word is inherent in all powerful phrase-making.”
—Susan Sontag (b. 1933)
“I want the necessity of supplying my own wants. All this costly culture of yours is not necessary. Greatness does not need it. Yonder peasant, who sits neglected, carries a whole revolution of man and nature in his head, which shall be a sacred history to some future ages.”
—Ralph Waldo Emerson (1803–1882)
“Powerful, yes, that is the word that I constantly rolled on my tongue; I dreamed of absolute power, the kind that forces to kneel, that forces the enemy to capitulate, finally converting him, and the more the enemy is blind, cruel, sure of himself, buried in his conviction, the more his admission proclaims the royalty of he who has brought on his defeat.”
—Albert Camus (1913–1960)
“The horizon is more than a convention of landscape painting, less than truth.”
—Mason Cooley (b. 1927)