Universo

El universo es el conjunto de todas las entidades físicamente detectables que interactúan entre ellas dentro del espacio-tiempo de acuerdo a leyes físicas bien definidas. Sin embargo, el término también se utiliza informalmente en sentidos contextuales ligeramente diferentes y alude a conceptos como cosmos, mundo, naturaleza o realidad.[1]​ Su estudio, en las mayores escalas, es el objeto de la cosmología, disciplina basada en la astronomía y la física, en la cual se describen todos los aspectos de este universo con sus fenómenos. Las ciencias físicas modelizan el universo como un sistema cerrado que contiene energía y materia adscritas al espacio-tiempo y que se rige fundamentalmente por principios causales. 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