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8 de set. de 2020 · A black hole is an astronomical object with a gravitational pull so strong that nothing, not even light, can escape it. A black hole’s “surface,” called its event horizon, defines the boundary where the velocity needed to escape exceeds the speed of light, which is the speed limit of the cosmos.
Há 4 dias · 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
Astronomers tracked the orbits of several stars near the center of the Milky Way to prove it houses a supermassive black hole, a discovery that won the 2020 Nobel Prize. When very massive objects accelerate through space, they create ripples in the fabric of space-time called gravitational waves.
The Black Hole: Directed by Gary Nelson. With Maximilian Schell, Anthony Perkins, Robert Forster, Joseph Bottoms. A research vessel finds a missing ship, commanded by a mysterious scientist, on the edge of a black hole.
- Gary Nelson
- 3 min
A black hole is a region of spacetime where gravity is so strong that nothing, not even 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.
12 de jul. de 2022 · Black holes: why they matter. As NASA’s James Webb Telescope begins to reveal images of the mysteries of the universe, we explore one of the most mysterious of all: black holes.
- 10 min
- 409,5K
- The Economist
12 de mai. de 2022 · At 27,000 light-years away, the behemoth is the closest giant black hole to Earth. That proximity means that Sgr A* is the most-studied supermassive black hole in the universe.