: A horizon is seen as a paradoxical limit; when you look directly at it, it ceases to be the horizon and becomes part of your view, always receding as you move. The Strategic Horizon: Planning and Scanning
: In physics, black holes possess an "event horizon," a one-way membrane that causally separates their internal region from the rest of the universe. The Philosophical Horizon: Frameworks of Meaning Articles on the topic: "horizon"
In business and policy, the term is used to categorize timeframes and anticipate future developments. : A horizon is seen as a paradoxical
: This is a major puzzle in the Big Bang model. Observations show that distant regions of the universe have identical temperatures, yet they are too far apart for light to have traveled between them to equalize those temperatures. : This is a major puzzle in the Big Bang model
A horizon scan of global biological conservation issues for 2024