The radius from a black hole inside of which it is impossible to escape (a "point of no return" called the Schwarzschild radius). It is also the radius at which a mass must be compressed down to in order to turn it into a black hole.
The boundary of a black hole, which forms when the surface of a collapsing star reaches the radius where light can no longer escape
the one-way surface of a black hole; once penetrated, the laws of gravity ensure that there is no turning back, no escaping the powerful gravitational grip of the black hole.
The "surface" of a black hole; the boundary of the region from within which no light can escape.
The event horizon is the radius from a black hole inside of which it is impossible to escape (a "point of no return" called the Schwarzschild radius).
the surface of a black hole: the boundary of a black hole beyond which nothing can escape from within it.
A black hole's point of no return. Any light or matter crossing within this boundary is doomed by the hole's gravity. Beyond this point, the escape velocity is greater than the speed of light, the ultimate speed limit. In essence, although it is not a physical boundary, the event horizon marks the black hole's "surface."
The imaginary surface of a black hole. The place at which the curvature of space-time (the gravity) of the singularity which lies at the center of the black hole is so large that nothing, including light, can escape. If an object passes through the event horizon, and into the interior of the black hole, it will never again be visible, and no event involving it can ever be detected -- hence the name of the horizon.
a boundary in spacetime for a given observer beyond which no electromagnetic energy, including light , can reach the observer
a phenomenon, so far as I am aware, solely associated with black holes, not worm holes
a theoretical sphere surrounding a black hole through which objects pass into oblivion
the location of the surface of a black hole. An outside observer cannot see in past the event horizon.
black disk encircling a black hole. The event horizon is the point at which light can no longer escape the gravitational forces of the black hole. The radius of the event horizon can be calculated by the equation Rs=2GM/C^2
in a black hole, the point beyond which events cannot be detected. This is the point of no return; an object that falls inside the event horizon can't get out.
A surface—like the one surrounding a Black Hole— enclosing a region of space from which nothing (even light) can ever escape.
surface surrounding a black hole (singularity) outside of which internal measurements except mass, electric charge, and rotation velocity become immeasurable and matter, normally, can no longer escape from the black hole's gravitational field due to its high escape velocity
Term relating to how far we can see into the universe, because the universe is only about 15 billion years old, we cannot observe any part of the universe that is farther away than 15 billion light years. As long as the universe continues to expand at a rate less than the speed of light, our event horizon will continue to get bigger as a function of time.
The distance from a black hole within which nothing can escape. Once a particle has entered this horizon, nothing can prevent it from hitting the singularity in a very short amount of proper time. In this sense, the event horizon is considered the point of no return.
Imaginary spherical surface surrounding a black hole, with radius equal to the Schwarzschild radius, within which no event can be seen heard, or known about by an outside observer. [More Info: Field Guide
The boundary of the region around a black hole from which nothing can escape once crossed.
The boundary of a black hole. The point of no return.
This is a milestone that is ahead of you - between where you are now (in the present) and the future that you desire for yourself. There will be many event horizons along your trajectory of intent, and at each you 'update' in relation to the present that you find yourself in to determine what your next event horizon will be. Event horizons form a part of the Exquisite Performance Coaching model, which is available as a stand along training program provided by Joseph Riggio.
The invisible boundary around a black hole past which nothing can escape the gravitational pull - not even light.
The surface through which a collapsing star passes when its velocity of escape is equal to the speed of light; that is, when the star becomes a black hole.
The imaginary sphere around a black hole that measures how close to the singularity you can safely get. Once you have passed the event horizon, it becomes impossible to escape. How big is a black hole
A spherical surface surrounding a black hole and marking the "point of no return" from which nothing can escape.
The radius of a black hole within which no light or matter can escape, because the escape velocity necessary to overcome the gravitational pull exceeds the speed of light.
The boundary or "point of no return" of a black hole. Nothing -- neither particles nor photons (i.e., electromagnetic radiation) -- can escape from inside the event horizon. To escape would require a speed greater than that of light, which is not allowed.
the distance from a black hole's center at which the escape velocity equals the speed of light. No information of events occurring inside the event horizon can get to the outside.
A region within which no event can ever be seen, heard, or known by anyone outside; also termed the "surface" of a black hole, and equal to a radius of 3 kilometers (~2 miles) times the region's contained mass expressed in units of the Sun's mass.
Surface in relativistic space around a black hole inside of which no photons of light can escape and will ever reach us.
The boundary of the region of a black hole from which no radiation may escape. No event that occurs within the event horizon is visible to a distant observer.
The boundary that marks the point of no return of a black hole. Once light (or matter) passes this, the gravitational forces are so strong that the escape velocity woild be greater than the speed of light. See also Schwarzchild radius.
The spherical outer boundary of a black hole. Once matter crosses this threshold, the speed required for it to escape the black hole's gravitational grip is greater than the speed of light.