Question

what is black hole ? in about 150 words

Answer 1

$black \: holes$

Everything in space seems to be orbiting something. Moons orbit planets and planets orbit stars. But what are all the stars circling around? The answer: extremely powerful objects called black holes. Black holes are regions of space that have such strong gravity, nothing can escape them. They just pull things close and then suck them in. What happens after, no one can say for sure.


$why \: black \: holes \: are \: black$



When we say that nothing can escape a black hole, we really mean it. Not even light waves can get out once they’re inside (light waves are the fastest thing in the Universe). This is what makes black holes black.

Note that the color black is just the absence of reflected light. We see it when something absorbs all of the visible light coming at it. A black hole does just that. As a result, it appears as a big black dot. In the blackness of space, that makes them pretty much invisible.

Black paint spot
We don’t really see the color black. It’s the absence of visible light.

And what enables a black hole to capture light? Simply, gravity. Gravity is a force associated with massive objects. The more massive something is, the harder it tugs on objects around it.

Well, black holes have masses equal to many, many times the mass of our sun. What’s more, all of it is compressed into a single point. We call that point a singularity. Singularities are immeasurably dense with matter. Nothing could ever come close to escaping their gravitational pull. It’s like if all the gravity from stars across many solar systems got put into a single point.


Black holes are some of the most perplexing objects in the entire Universe. Objects so dense, where gravitation is so strong, that nothing, not even light, can ever escape from it. Many physical black holes have been identified, from stellar-mass scale ones in our own galaxy to supermassive ones at the centers of the majority of galaxies, many millions or even billions of times the mass of our Sun. The key property surrounding the event horizon, that light can never escape from within it, sets up a boundary in space

Answer 2

ANSWER :

A black hole is a region of space from which nothing can escape, according to the general theory of relativity, it is the result of the curving of spacetime caused by a huge mass. Around a black hole there is a position of no return, called the event horizon.Conventional black holes are formed by gravitational collapse of heavy objects such as stars, but they can also in theory be formed by other processes.A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.