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1. www.nasa.gov › universe › what-are-black-holesWhat Are Black Holes? - NASA

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   Sep 8, 2020 · Article. 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. Matter and radiation fall in, but ...

2. www.cfa.harvard.edu › research › topicBlack Holes | Center for Astrophysics | Harvard & Smithsonian

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   When that happens, the black hole can strip material from the star, causing the gas to heat up and glow brightly in X-rays. Supermassive Black Holes are the monsters of the universe, living at the centers of nearly every galaxy. They range in mass from 100,000 to billions of times the mass of the Sun, far too massive to be born from a single star.

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     How Do Stars Collapse To Form Black Holes? | BYJU'S Celestial Wonders #shorts

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     How Do Stars Survive Around Black Holes?! | How the Universe Works | Science Channel

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     Birth of a Black Hole | How the Universe Works

     Nov 25, 2013

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4. www.astronomy.com › science › black-holes-explainedBlack holes, explained by an astrophysicist - Astronomy Magazine

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   Dec 11, 2023 · A black hole is a region of universe where gravity is so outrageously strong that nothing, not even light, can escape. Once something enters a black hole by crossing an invisible boundary known as ...

5. www.astronomy.com › science › the-physics-ofThe physics of accretion: How the universe pulled itself together

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   Jun 16, 2022 · NASA/JPL-Caltech. Accretion is one of the most fundamental processes in the cosmos. It is a universal phenomenon triggered by gravity, and the process by which bits of matter accumulate and ...

6. news.uchicago.edu › explainer › black-holes-explainedWhat is a black hole? | University of Chicago News

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   Black holes, explained. Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are created when giant stars collapse, and perhaps by other methods that are still unknown. Black holes fascinate both the public and scientists ...

7. www.asc-csa.gc.ca › fact-sheets › black-holeFact sheet: Black hole - Canadian Space Agency

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   Description. A black hole is a region of space having a gravitational field so intense that no matter or radiation can escape. A black hole is created after the death of a very massive star. The core of the star collapses in on itself, causing a supernova – a massive explosion of the star's outer layers. All of the former star's matter is ...

8. People also ask

   What happens if a black hole hits a star?

   • When that happens, the black hole can strip material from the star, causing the gas to heat up and glow brightly in X-rays. Supermassive Black Holes are the monsters of the universe, living at the centers of nearly every galaxy. They range in mass from 100,000 to billions of times the mass of the Sun, far too massive to be born from a single star.

   Black Holes | Center for Astrophysics | Harvard & Smithsonian

   www.cfa.harvard.edu/research/topic/black-holes

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   What is a black hole in space?

   • (Credit: Event Horizon Telescope Collaboration) A black hole is a region of space having a gravitational field so intense that no matter or radiation can escape. A black hole is created after the death of a very massive star. The core of the star collapses in on itself, causing a supernova – a massive explosion of the star's outer layers.

   Fact sheet: Black hole - Canadian Space Agency

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   How does a black hole work?

   • 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. Matter and radiation fall in, but they can’t get out.

   What Are Black Holes? - NASA

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   How do black holes interact with other astronomical objects?

   • Hunting for black hole interactions with other astronomical objects. That includes “disruption” events, where black holes tear stars or other objects apart, creating bursts of intense light. Observing clusters of stars to find intermediate mass black holes, and modeling how they shape their environments.

   Black Holes | Center for Astrophysics | Harvard & Smithsonian

   www.cfa.harvard.edu/research/topic/black-holes

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   Can a star build a black hole?

   • A visualization of the black hole at the center of the Milky Way. Credit: Abhishek Joshi/UIUC We know of only one sure-fire method for building black holes, and that’s through the death of a massive star. When a star at least eight times larger than the Sun nears its end, it forms a core of solid iron and nickel.

   Black holes, explained by an astrophysicist - Astronomy Magazine

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   What happens if a star collapses?

   • The core of the star collapses in on itself, causing a supernova – a massive explosion of the star's outer layers. All of the former star's matter is then concentrated into a single tiny point (known as a singularity). The gravity of a black hole is so strong that nothing – not even light – can escape its pull.

   Fact sheet: Black hole - Canadian Space Agency

   www.asc-csa.gc.ca/eng/astronomy/fact-sheets/black-hole.asp

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9. kids.britannica.com › kids › articleblack hole - Kids | Britannica Kids | Homework Help

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   A black hole can be formed when a huge star uses up its fuel. A star is normally a huge ball of a gas called hydrogen, which serves as fuel for the star. The star constantly changes the hydrogen into other gases and in the process makes energy. The energy pushes outward. At the same time, the star’s gravity pulls inward.