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Latest Horizon problem Stories

2e67fb2d8dc2171c3e23c8df0c6fcd3d1
2006-03-16 12:45:00

NASA -- You don't get much closer to the big bang than this. Scientists peering back to the oldest light in the universe have evidence to support the concept of inflation, which poses that the universe expanded many trillion times its size faster than a snap of the fingers at the outset of the big bang. We're talking about when the universe was less than a trillionth of a trillionth of a second old. In that crucial split second, changes occurred that allowed for the creation of stars and...


Latest Horizon problem Reference Libraries

6_5daa7ca55793bcf9bd03dd45c1a97f4f2
2004-10-19 04:45:41

Inflation -- Inflation is the idea - first proposed by Alan Guth (1981) - that the nascent universe passed through a phase of exponential expansion that was driven by a negative vacuum energy density (positive vacuum pressure). This expansion can be modelled by a non-zero cosmological constant. As a direct consequence of this expansion, all of the observable universe is posited to have originated in a small, initially causally-connected region. Quantum fluctuations in this microscopic...

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