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The beginning of the universe doesn’t need to be singular, so doubts about a singularity don’t need to translate into doubts about a beginning. Source
Oscillating universes have been discussed in philosophy from time immemorial and in mathematical cosmology for over one hundred years. Source
No quantum gravity. The wrong peak in the wave function. Boltzmann Babies. Roger Penrose pointing out that the arrow of time was smuggled in through the back door. The no-boundary...
Run Hawking's machinery and out pops something startling: the most likely universe looks an awful lot like ours, complete with inflation, a low-entropy beginning, and an arrow of t...
The ekpyrotic theory tries to beat inflation with bouncing higher-dimensional branes, no singularity, and a universe that has always existed. A tour of the prettiest version of the...
Hawking faced a question with no answer hiding behind it. The best boundary condition for the universe, he decided, was that there was no boundary at all. To make that statement in...
Penrose was right, then, that fashion, faith, and fantasy have led much of modern cosmology astray. He was more right than he knew. Source
Inflation is awkward, possibly not even a proper theory, and it has reigned over cosmology for forty years anyway. Here is what it claims, the flatness, horizon, and monopole probl...
As with life, the beginning of our universe entailed special conditions, not only of the laws of physics, but also of the arrangement of its component atoms. Source
Often attributed to Albert Einstein, the quote by science-fiction writer Ray Cummings still serves as the most succinct explanation for one of the most fundamental features of our...
The ekpyrotic universe is a beautiful idea that runs headlong into the data. From hand-waved singularities and assumed dark energy to the killer blow from Planck and WMAP measureme...
For nearly thirty years, dark energy has been cosmology's great get out of jail free card, the invisible, mysterious force we invented to explain why the universe is expanding fast...
Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a new paper published in Proceedings of the Royal Society...
Scientists have uncovered a surprising connection between quantum gravity and an exotic quantum state of matter that could explain why the universe isn’t expanding wildly fast. The...
In 2011, three physicists won the Nobel Prize for showing that the expansion of the universe speeds up, which is usually attributed to aa mysterious type of energy called “dark ene...
This brings us, at last, to the remaining “cyclic” proposal, that of Roger Penrose, which is perhaps the most quixotic of all. Source
About 25 years ago, astrophysicists noticed that the universe’s expansion is accelerating. To account for this observation, physicists came up with a new type of energy – called da...
Last year, a study sent a quiet tremor through the field of cosmology. A team of researchers claimed that the universe's expansion might be slowing down, not speeding up, suggestin...
A look at why a cyclic, eternally repeating universe is such an appealing idea, and why the first serious attempt to build one, Richard Tolman's 1930s model of endless big bangs an...
A Reconstructed Undergraduate Cosmology ThesisContinue reading on Medium »
A new relativity model suggests gravastars could form when dark energy creates an expanding mini-universe inside a collapsing star, preventing a black hole.
Stellar mass black holes may not be black holes at all. Instead, they could be a type of extremely compact star called a gravastar, which mimics a black hole. This is according to...
Inside some very special black holes, there may be a boundary called a Cauchy horizon. Columnist Leah Crane explores the place beyond which physics breaks and anything is possible
Источник: Компьютерра - Журнал о науке и технологиях Американские математики представили математическое доказательство того, что текущая модель расширяющейся Вселенной, основанная...
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