Cosmos | Stars, Galaxies, Nebulae | Britannica
https://www.britannica.com/science/Cosmos-astronomy
WEBApr 10, 2024 · 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.
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