Where gravity wins completely
What Is a Black Hole?
A black hole is a region of space where gravity is so strong that nothing, not even light, can escape. Here is what they are, how they form, and what falling into one would actually involve.
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Nothing is truly empty
Is Space Completely Empty?
Space is not empty. It contains gas, dust, radiation, magnetic fields, dark matter, and quantum fluctuations. The emptiest regions still have something in them.
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