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  1. 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 the boundary …

  2. 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 electromagnetic …

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

    Nov 17, 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 can be …

  4. Black Hole 101 - Education

    May 31, 2024 · At the center of our galaxy, a supermassive black hole churns. Learn about the types of black holes, how they form, and how scientists discovered these invisible, yet extraordinary objects …

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

    May 6, 2022 · Black holes are real — and they're some of the most mysterious objects in space. Discover what they are, how they form, and why they captivate scientists.

  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 a …

  7. Black Hole Explained: The Science, Discovery, and Mysteries of the ...

    Nov 6, 2025 · Learn what a black hole is, how it forms, and how astronomers detect it. Understand the science behind black holes and their role in shaping the universe.

  8. 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.

  9. Black Holes Explained for Beginners Formation & Facts

    5 days ago · In this video, you’ll learn what a black hole is, how it forms, and what really happens beyond the event horizon. Simple science, real facts, and cosmic mystery — explained clearly.

  10. What is a black hole? Black holes explained | Royal Observatory

    Black holes are peculiar objects with many strange properties, so what exactly are these mysterious entities? What is a black hole? The short answer: A black hole is an area in space where gravity is …