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In physical cosmology, baryogenesis (also known as baryosynthesis [1] [2]) is the physical process that is hypothesized to have taken place during the early universe to produce baryonic asymmetry, i.e. the imbalance of matter and antimatter (antibaryons) in the observed universe.
All the particles that make up the matter around us, such electrons and protons, have antimatter versions which are nearly identical, but with mirrored properties such as the opposite electric charge.
The spacetime of the universe is, unlike the diagrams, four-dimensional. The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special ...
Neither the standard model of particle physics nor the theory of general relativity provides a known explanation for why this should be so, and it is a natural assumption that the universe is neutral with all conserved charges. [3] The Big Bang should have produced equal amounts of matter and antimatter. Since this does not seem to have been ...
The word comes from the Greek (ἥλιος helios "sun" and κέντρον kentron "center"). The notion that the Earth revolves around the Sun had been proposed as early as the 3rd century BC by Aristarchus of Samos, [10] [11] [note 2] but had received no support from most other ancient astronomers.
The physical universe is defined as all of space and time [a] (collectively referred to as spacetime) and their contents. [10] Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
A concrete circle at the apex of a rebuilt span of the old Boston Avenue viaduct, between 1st and Archer Streets, in Tulsa, Oklahoma is known as "The Center of the Universe". The spot produces an acoustical anomaly [13] and it is for which the Center of the Universe Festival and Ms. Center of the Universe Pageant are named. [citation needed]
Under current theory, the Big Bang explosion that initiated the universe should have produced equal amounts of matter and antimatter. This, however, does not seem to be the case.