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Cosmos
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Christian Aristotelian cosmos
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Cosmos

astronomy
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Cosmos, in astronomy, the entire physical universe considered as a unified whole (from the Greek kosmos, meaning “order,” “harmony,” and “the world”). Humanity’s growing understanding of all the objects and phenomena within the cosmic system is explained in the article universe. For a history of the study of the universe as a unified whole, see cosmology.

This article was most recently revised and updated by Erik Gregersen.