Dark energy is continuously created rather than being solely a product of the Big Bang. Its density remains constant despite the increasing distances between unbound objects in the universe. Approximately 5 billion years ago, dark energy became strong enough to counteract gravity. The concept of dark energy is closely related to the Cosmological Constant, which is considered an intrinsic property of vacuum energy density, remaining constant over time and not diluting as the universe expands.
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Dark energy "springs into existence" continuously. The density of dark energy between objects remains the same even though the distances between the (unbound) objects is get larger. That's the sense in which it "springs into existence".Ken Lehn said:Summary: Was all dark energy "born" at the moment of the Big Bang? Or does it "spring" into existence continually?
Was all dark energy "born" at the moment of the Big Bang? Or does it "spring" into existence continually?
It is still plausible that dark energy is identical with the Cosmological Constant. The CC is thought to be an intrinsic property of vacuum. People often talk about vacuum energy density. As such it exists as long as the universe exists and its density is constant over time. In other words it doesn't get diluted like matter does if the universe expands.Ken Lehn said:Was all dark energy "born" at the moment of the Big Bang? Or does it "spring" into existence continually?