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1 day ago · A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it. Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
- Simple English
The supermassive black hole inside the core of the...
- Talk
Black hole is a former featured article.Please see the links...
- List of Black Holes
1ES 2344+514; Ton 618 (this quasar has possibly the biggest...
- Spacetime
In physics, spacetime is a mathematical model that fuses the...
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We would like to show you a description here but the site...
- Event Horizon
The reachable Universe as a function of time and distance,...
- Black Body
An approximate realization of a black body as a tiny hole in...
- Messier 87
It has an active supermassive black hole at its core, which...
- Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source...
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10 hours ago · A James Webb Telescope image shows the J0148 quasar circled in red. Two insets show, on top, the central black hole, and on bottom, the stellar emission from the host galaxy.
6 days ago · Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. It can be formed by the death of a massive star wherein its core gravitationally collapses inward upon itself, compressing to a point of zero volume and infinite density called the singularity.
- The Editors of Encyclopaedia Britannica
- What is a black hole?A black hole is a cosmic body of extremely intense gravity from which even light cannot escape. Black holes usually cannot be observed directly, bu...
- What is the structure of a black hole?The singularity constitutes the center of a black hole, hidden by the object’s “surface,” the event horizon. Inside the event horizon, the escape v...
- How is a black hole formed?A black hole can be formed by the death of a massive star. At the end of a massive star's life, the core becomes unstable and collapses in upon its...
- What are some examples of black holes?One example of a black hole is can be found in Cygnus X-1, a binary X-ray system consisting of a blue supergiant and an invisible companion 14.8 ti...
2 days ago · The slow leak of what’s now known as Hawking radiation would, over time, cause the black hole to simply evaporate. This infographic shows the estimated lifetimes and event horizon –– the point past which infalling objects can’t escape a black hole’s gravitational grip –– diameters for black holes of various small masses.
May 1, 2024 · In the spirit of impartiality, Paxman does not shy away from the violence of empire but he does retreat into a more basic register. On the Black Hole of Calcutta, he writes: ‘precise numbers were not the point. Clearly, far too many people were crammed into a horrible confined space’ (p. 76).
2 days ago · On May 12, 2022, the first image of Sagittarius A* was released by the Event Horizon Telescope Collaboration. The image, which is based on radio interferometer data taken in 2017, confirms that the object contains a black hole. This is the second image of a black hole.
