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Conformal cyclic cosmology (CCC) is a cosmological model in the framework of general relativity and proposed by theoretical physicist Roger Penrose. [1] [2] [3] In CCC, the universe iterates through infinite cycles, with the future timelike infinity (i.e. the latest end of any possible timescale evaluated for any point in space) of each previous iteration being identified with the Big Bang ...
Katherine J. Mack (born 1 May 1981) [3] is a theoretical cosmologist who holds the Hawking Chair in Cosmology and Science Communication at the Perimeter Institute.Her academic research investigates dark matter, vacuum decay, and the Epoch of Reionization.
CMB spectral distortions are tiny departures of the average cosmic microwave background (CMB) frequency spectrum from the predictions given by a perfect black body.They can be produced by a number of standard and non-standard processes occurring at the early stages of cosmic history, and therefore allow us to probe the standard picture of cosmology.
Without the expansion of the universe to cause the cooling of the CMB, the night sky would shine as brightly as the Sun. [13] The energy density of the CMB is 0.260 eV/cm 3 (4.17 × 10 −14 J/m 3), about 411 photons/cm 3. [14]
Hawking spoke with WIRED on a wide range of topics in a new interview, directly addressing Trump's stance on climate change -- arguably unsurprising given his well known concerns over our planets ...
In the photo, Professor Hawking can be seen with his then wife Jane and children Robert and Lucy on their California estate in Sky Reveals ‘Hawking: Can You Hear Me?’ Release Date, First-Look ...
The discovery of cosmic microwave background radiation constitutes a major development in modern physical cosmology.In 1964, US physicist Arno Allan Penzias and radio-astronomer Robert Woodrow Wilson discovered the cosmic microwave background (CMB), estimating its temperature as 3.5 K, as they experimented with the Holmdel Horn Antenna.
If the universe started with even slightly different temperatures in different places, the CMB should not be isotropic unless there is a mechanism that evens out the temperature by the time of decoupling. In reality, the CMB has the same temperature in the entire sky, 2.726 ± 0.001 K. [3]