What Are Black Holes? - NASA
2020年9月8日 · 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 …
Black hole - Wikipedia
A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. [2] Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. [3] [4] The boundary of no escape is called the event horizon.
Black hole | Definition, Formation, Types, Pictures, & Facts
2024年12月14日 · 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.
Black Holes 101 | National Geographic - YouTube
Learn about the types of black holes, how they form, and how scientists discovered these invisible, yet extraordinary objects in our universe....more. At the center of our galaxy, a...
The Black Hole (1979 film) - Wikipedia
The Black Hole is a 1979 American science fiction film directed by Gary Nelson and produced by Walt Disney Productions. The film stars Maximilian Schell , Robert Forster , Joseph Bottoms , Yvette Mimieux , Anthony Perkins and Ernest Borgnine , while the voices of the main robot characters are provided by Roddy McDowall and Slim Pickens (both ...
First Image of a Black Hole - NASA Science
2019年4月10日 · What is a Black Hole? A black hole is a dense, compact object whose gravitational pull is so strong that – within a certain distance of it – nothing can escape, not even light. Black holes are thought to result from the collapse of …
Black Holes - NASA Science
Black holes are among the most mysterious cosmic objects, much studied but not fully understood. These objects aren’t really holes. They’re huge concentrations of matter packed into very tiny spaces.
10 Questions You Might Have About Black Holes - NASA Science
2019年9月23日 · A black hole is an extremely dense object in space from which no light can escape. While black holes are mysterious and exotic, they are also a key consequence of how gravity works: When a lot of mass gets compressed into a small enough space, the resulting object rips the very fabric of space and time, becoming what is called a singularity.
What Is a Black Hole? | NASA Space Place – NASA Science for Kids
2024年12月5日 · A black hole is an area of such immense gravity that nothing—not even light—can escape from it. Black holes form at the end of some stars’ lives. The energy that held the star together disappears and it collapses in on itself producing a magnificent explosion.
Black holes: Everything you need to know | Space
2022年5月6日 · Black holes are real, they're some of the strangest objects in space. Discover what black holes are and how they form with our informative black hole guide.