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  1. Black hole - Wikipedia

    There is consensus that supermassive black holes exist in the centres of most galaxies. The presence of a black hole can be inferred through its interaction with other matter and with …

  2. What 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 …

  3. Black hole | Definition, Formation, Types, Pictures, & Facts

    Dec 20, 2025 · What is a black hole? A black hole is a cosmic body of extremely intense gravity from which even light cannot escape. Black holes usually cannot be observed directly, but they …

  4. Black holes — Everything you need to know | Space

    May 6, 2022 · Black holes are some of the strangest and most fascinating objects in the universe. They're extremely dense, with gravitational forces so strong, that nothing, not even lights, can …

  5. Black Hole - Definition, Formation, Types, and Mysteries

    Sep 20, 2025 · Explore what a black hole is, how one forms, their types, structure, history, and the latest discoveries about these cosmic enigmas.

  6. Black Holes | NSF - U.S. National Science Foundation

    Black holes are extremely dense pockets of matter, objects of such incredible mass and miniscule volume that they drastically warp the fabric of space-time. Anything that passes too close, from …

  7. This Simulation Reveals What Really Happens Near Black Holes

    Dec 22, 2025 · Black holes are among the most extreme objects in the universe, and now scientists can model them more accurately than ever before. By combining Einstein’s gravity …

  8. Black Holes - Harvard–Smithsonian Center for Astrophysics

    Black holes are some of the most fascinating and mind-bending objects in the cosmos. The very thing that characterizes a black hole also makes it hard to study: its intense gravity. All the …

  9. Understanding Black Holes - sciencenewstoday.org

    Jul 26, 2025 · Black holes challenge our assumptions not just about matter and energy, but about causality, time, and the knowability of the universe. They are nature’s way of keeping …

  10. 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.