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Mar 3, 2023 · The event horizon is the spherical outer boundary of a black hole loosely considered to be its "surface." It is the point, according to NASA, that the gravitational influence of the...
Topologically, the event horizon is defined from the causal structure as the past null cone of future conformal timelike infinity. A black hole event horizon is teleological in nature, meaning that it is determined by future causes.
Jun 1, 2024 · Learn about the event horizon, the boundary of a black hole where the escape velocity is equal to the speed of light. Find out how Hawking radiation and other phenomena are related to the event horizon.
- The Editors of Encyclopaedia Britannica
The event horizon captures any light passing through it, and the distorted space-time around it causes light to be redirected through gravitational lensing. These two effects produce a dark zone that astronomers refer to as the event horizon shadow, which is roughly twice as big as the black hole’s actual surface.
Oct 27, 2021 · Learn how NASA's James Webb Space Telescope will join the Event Horizon Telescope collaboration to capture a sharper image of the supermassive black hole at the heart of our galaxy, Sagittarius A*. Find out how Webb's infrared data will help to understand the mysterious flares and the nature of black holes.
Sep 8, 2020 · Learn about the different types and origins of black holes, and how they are observed by telescopes and gravitational waves. See the first image of a black hole's event horizon, the boundary where nothing can escape.
Apr 10, 2019 · Learn how NASA spacecraft and ground-based radio telescopes worked together to image the shadow of a supermassive black hole in M87 galaxy. Find out what mysteries the data may reveal about the origin of jets and the nature of black holes.
