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  1. Dictionary
    black hole
    /blak ˈhəʊl/

    noun

    • 1. a region of space having a gravitational field so intense that no matter or radiation can escape.
  2. www.nasa.gov › universe › what-are-black-holesWhat Are Black Holes? - NASA

    Sep 8, 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.

  3. en.wikipedia.org › wiki › Black_holeBlack 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.

  4. Nov 11, 2024 · 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.

  5. Anything that passes too close, from a wandering star to a photon of light, gets captured. Most black holes are the condensed remnants of a massive star, the collapsed core that remains following an explosive supernova.

  6. A black hole is so dense that gravity just beneath its surface, the event horizon, is strong enough that nothing – not even light – can escape. The event horizon isn’t a surface like Earth’s or even the Sun’s. It’s a boundary that contains all the matter that makes up the black hole.

  7. Black holes are objects with an intense gravitational pull so strong that not even beams of light, the fastest things in the universe, can escape. This makes them impossible to see...

  8. A black hole is an area of such immense gravity that nothingnot even lightcan 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. Here’s where things get crazy.

  9. The short answer: A black hole is an area in space where gravity is so strong that light can not get out. Explanation: If a ball is thrown upwards from the surface of the Earth it reaches a certain height and then falls back. The harder it is thrown, the higher it goes.

  10. www.nasa.gov › podcasts › curious-universeInside a Black Hole - NASA

    Nov 23, 2020 · But what exactly is a black hole? HOST PADI BOYD: Let’s start with the word “Black”. The name comes from the fact that nothing can escape the gravity of a black hole, not even light. HOST PADI BOYD: How can they keep such a tight hold on everything? Well they are extremely massive.

  11. Nov 8, 2024 · A black hole is an area of such immense gravity that nothingnot even lightcan 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.