what's blackhole .
A black
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hole is a region in space where gravity is so
intense that nothing, not even light, can escape from it.[1][2] It forms when a
massive star exhausts its nuclear fuel, collapses under its own weight, and
compresses into a singularity—a point of infinite density surrounded by an event
horizon, the point of no return.[1][3] ## Key Structure The event horizon acts
as the black hole's boundary, where escape velocity exceeds the speed of
light.[2][3] At the center lies the singularity, where known physics breaks down
due to extreme conditions.[1][4] ## Formation Process Stellar-mass black holes
arise from stars over 20 times the Sun's mass exploding as supernovae, leaving
behind collapsed cores.[3] Supermassive ones, millions to billions of solar
masses, lurk at galaxy centers, like Sagittarius A* in the Milky Way, though
their exact origins remain unclear.[3][9] ## Observation Methods Black holes are
detected indirectly through their gravitational effects on stars, X-ray
emissions from hot accretion disks of infalling matter, or gravitational waves
from mergers.[2][10] The Event Horizon Telescope imaged the shadow of M87's
black hole in 2019, confirming predictions.[3] Citations: [1] Black hole |
Definition, Formation, Types, Pictures, & Facts
https://www.britannica.com/science/black-hole [2] Black hole - Wikipedia
https://en.wikipedia.org/wiki/Black_hole [3] What Are Black Holes?
https://www.nasa.gov/universe/what-are-black-holes/ [4] Black Hole Basics - NASA
Science https://science.nasa.gov/universe/black-holes/ [5] Black holes,
explained - UChicago News - The University of Chicago
https://news.uchicago.edu/explainer/black-holes-explained [6] What are black
holes, exactly?
https://www.reddit.com/r/cosmology/comments/16444lc/what_are_black_holes_exactly/
[7] What is a black hole? Astro-Investigates Ep. 1 (Black Holes)
https://www.youtube.com/watch?v=nJ4d4QEDOYM [8] What is a Black Hole? Science
For Kids https://www.youtube.com/watch?v=a0XoTRPDtWQ [9] What is a Black Hole?
We Asked a NASA Expert https://www.youtube.com/watch?v=EJXTZ5jpSmk [10] Black
Holes | Center for Astrophysics | Harvard & Smithsonian
https://www.cfa.harvard.edu/research/topic/black-holes
