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.A black hole has a great effect on the fate and circumstances ...
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 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. A black hole is so dense that gravity just beneath its surface, the event horizon, is strong enough that nothing – not even light – can ...
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.
Hubble Black Holes - NASA Science
2024年9月25日 · Black holes are places where physics as we understand it breaks down, where the world of the very large meets the world of the unbelievably small. They consist of two main parts ― the singularity, that central region of tiny but immense density, and the event horizon, the point past which nothing can escape the black hole’s gravity.
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.
NASA’s IXPE Details Shapes of Structures at Newly Discovered Black Hole
2024年12月6日 · NASA’s IXPE (Imaging X-ray Polarimetry Explorer) has helped astronomers better understand the shapes of structures essential to a black hole – specifically, the disk of material swirling around it, and the shifting plasma region called the corona.The stellar-mass black hole, part of the binary system Swift J1727.8-1613, was discovered in the summer of 2023 during an unusual brightening ...
NASA Telescopes Discover Record-Breaking Black Hole
2023年11月6日 · Astronomers found the most distant black hole ever detected in X-rays (in a galaxy dubbed UHZ1) using the Chandra and Webb space telescopes. X-ray emission is a telltale signature of a growing supermassive black hole. This result may explain how some of the first supermassive black holes in the universe formed.
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.
What Is a Black Hole? - National Geographic
Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can escape the powerful tug of a black hole's gravity. And anything...