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The physical universe is defined as all of space and time (collectively referred to as spacetime) and their contents. 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.
Cosmos. Flammarion engraving, Paris 1888. The cosmos ( Ancient Greek: κόσμος, romanized : Kósmos, / ˈkɒzmɒs /, US also /- moʊs, - məs /) [1] is an alternative name for the universes or its nature or order. Usage of the word cosmos implies viewing the universe as a complex and orderly system or entity. The Cosmos can be Universe or ...
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.
Dark matter (26.8%) Dark energy (68.3%) [6] The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the ...
Pantheism. Pantheism is the philosophical and religious belief that reality, the universe, and nature are identical to divinity or a supreme entity. [1] The physical universe is thus understood as an immanent deity, still expanding and creating, which has existed since the beginning of time. [2] The term pantheist designates one who holds both ...
Nature is an inherent character or constitution, [1] particularly of the ecosphere or the universe as a whole. In this general sense nature refers to the laws, elements and phenomena of the physical world, including life. Although humans are part of nature, human activity or humans as a whole are often described as at times at odds, or outright ...
t. e. The multiverse is the hypothetical set of all universes. [1] [a] Together, these universes are presumed to comprise everything that exists: the entirety of space, time, matter, energy, information, and the physical laws and constants that describe them. The different universes within the multiverse are called "parallel universes", "flat ...
Metaphysics is the branch of philosophy that examines the basic structure of reality. It is often characterized as first philosophy, implying that it is more fundamental than other forms of philosophical inquiry. Metaphysics is traditionally seen as the study of mind-independent features of the world, but some modern theorists understand it as ...