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Galactic clusters are gravitationally bound large-scale structures of multiple galaxies. The evolution of these aggregates is determined by time and manner of formation and the process of how their structures and constituents have been changing with time. Gamow (1952) and Weizscker (1951) showed that the observed rotations of galaxies are important for cosmology. They postulated that the rotation of galaxies might be a clue of physical conditions under which these systems formed. Thus, understanding the distribution of spatial orientations of the spin vectors of galaxies is critical to understanding the origin of the angular momenta of galaxies.

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  • Galactic orientation (en)
  • Orientation galactique (fr)
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  • Galactic clusters are gravitationally bound large-scale structures of multiple galaxies. The evolution of these aggregates is determined by time and manner of formation and the process of how their structures and constituents have been changing with time. Gamow (1952) and Weizscker (1951) showed that the observed rotations of galaxies are important for cosmology. They postulated that the rotation of galaxies might be a clue of physical conditions under which these systems formed. Thus, understanding the distribution of spatial orientations of the spin vectors of galaxies is critical to understanding the origin of the angular momenta of galaxies. (en)
  • Les amas de galaxies sont des structures à grande échelle de multiples galaxies en interaction gravitationnelle. L'évolution de ces agrégats est déterminée par le temps et la manière dont elles se sont formées, ainsi que les processus selon lesquels leurs structures et leurs constituants ont changé au cours du temps. Weizscker en 1951 et George Gamow en 1952 ont montré que les rotations que l'on observait avaient de l'importance en cosmologie. Ils ont postulé que la rotation des galaxies pouvait constituer un indice des conditions physiques de leurs formations. Ainsi, comprendre la distribution des orientations spatiales de leurs axes de rotation constitue un point critique de la compréhension de l'origine de leurs moments angulaires. (fr)
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  • Galactic clusters are gravitationally bound large-scale structures of multiple galaxies. The evolution of these aggregates is determined by time and manner of formation and the process of how their structures and constituents have been changing with time. Gamow (1952) and Weizscker (1951) showed that the observed rotations of galaxies are important for cosmology. They postulated that the rotation of galaxies might be a clue of physical conditions under which these systems formed. Thus, understanding the distribution of spatial orientations of the spin vectors of galaxies is critical to understanding the origin of the angular momenta of galaxies. There are mainly three scenarios for the origin of galaxy clusters and superclusters. These models are based on different assumptions of the primordial conditions, so they predict different spin vector alignments of the galaxies. The three hypotheses are the pancake model, the hierarchy model, and the primordial vorticity theory. The three are mutually exclusive as they produce contradictory predictions. However, the predictions made by all three theories are based on the precepts of cosmology. Thus, these models can be tested using a database with appropriate methods of analysis. (en)
  • Les amas de galaxies sont des structures à grande échelle de multiples galaxies en interaction gravitationnelle. L'évolution de ces agrégats est déterminée par le temps et la manière dont elles se sont formées, ainsi que les processus selon lesquels leurs structures et leurs constituants ont changé au cours du temps. Weizscker en 1951 et George Gamow en 1952 ont montré que les rotations que l'on observait avaient de l'importance en cosmologie. Ils ont postulé que la rotation des galaxies pouvait constituer un indice des conditions physiques de leurs formations. Ainsi, comprendre la distribution des orientations spatiales de leurs axes de rotation constitue un point critique de la compréhension de l'origine de leurs moments angulaires. Il existe trois scénarios principaux pour explique l'origine des amas et des superamas de galaxies. Ces modèles se fondent sur des affirmations différentes quant aux conditions de l'univers primordial, et par conséquent ils prédisent des alignements différents des axes de rotation des galaxies. Les trois hypothèses sont la théorie du vortex primordial, le modèle de la crêpe, et le modèle hiérarchique. Ces trois modèles s'excluent mutuellement parce qu'ils conduisent à des prédictions contradictoires. Cependant, les prédictions induites par chacune des trois théories reposent toutes sur les préceptes de la cosmologie. Ainsi, ces modèles peuvent être testés à l'aide d'une base de données et l'usage de méthodes d'analyse appropriées. (fr)
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