"A positive pressure produces an attractive gravitational field... Positive pressures are just sort of normal pressures and attractive gravity is normal gravity, so normal pressures produce normal gravity, but it is possible to have negative pressures, and negative pressures produce repulsive gravity, and that's the secret of what makes inflation possible."
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Academics from the United StatesJews from the United StatesCosmologistsPhysicists from the United StatesAstronomers from the United States
Original Language: English
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Lecture 1: Inflationary Cosmology: Is Our Universe Part of a Multiverse? Part I.
https://en.wikiquote.org/wiki/Alan_Guth
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Alan Guth
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