What keeps space empty?
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Answers
Question:
What keeps space empty?
Answer:
As in the rest of physics, its nature has turned out to be mind-bendingly weird: Empty space is not really empty because nothing contains something, seething with energy and particles that flit into and out of existence. Physicists have known that much for decades, ever since the birth of quantum mechanics..
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Answer:
Vacuum energy (also called vacuum fluctuations or zero-point energy) is a sea of particles and antiparticles flashing briefly into and out of existence. Vacuum energy has a very real effect because it weakens, or screens, electric fields.
99.9999999% of your body is empty space.
Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays. ... Outer space does not begin at a definite altitude above the Earth's surface.