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Thus, an accelerating universe took a longer time to expand from 2/3 to 1 times its present size, compared to a non-accelerating universe with constant ˙ and the same present-day value of the Hubble constant. This results in a larger light-travel time, larger distance and fainter supernovae, which corresponds to the actual observations.
Regardless of the overall shape of the universe, the question of what the universe is expanding into is one that does not require an answer, according to the theories that describe the expansion; the way we define space in our universe in no way requires additional exterior space into which it can expand, since an expansion of an infinite ...
A cosmological horizon is a measure of the distance from which one could possibly retrieve information. [1] This observable constraint is due to various properties of general relativity, the expanding universe, and the physics of Big Bang cosmology. Cosmological horizons set the size and scale of the observable universe. This article explains a ...
Self-expansion motives can explain why people may appreciate intergroup contact, however, it can also provide explanations for why we avoid this intergroup contact. People may be cautious of self-expansion due to a sense of self-loss. As we self-expand in one area we may put ourselves at risk of losing aspects of the self in another area.
1791 – Erasmus Darwin pens the first description of a cyclical expanding and contracting universe in his poem The Economy of Vegetation. 1796 – Pierre Laplace re-states the nebular hypothesis for the formation of the Solar System from a spinning nebula of gas and dust. [75] 1826 – Heinrich Wilhelm Olbers puts forth Olbers' paradox.
Jul. 13—FLOYDS KNOBS — The glassy-smooth stillness of the lake was interrupted only by the ripples of the bobber disturbing the water. The ear-to-ear grin on the little girl's face announced ...
However, "In December, 1980 when Guth was developing his inflation model, he was not trying to solve either the flatness or horizon problems. Indeed, at that time, he knew nothing of the horizon problem and had never quantitatively calculated the flatness problem". [22] He was a particle physicist trying to solve the magnetic monopole problem."
Daily average mortgage rates on popular terms are rising as of Friday, December 20, 2024, with sharp moves higher for 30-year terms edging closer to 6.90% — an average 20 basis points higher ...