What is the Cosmos? A Definition

The Cosmos is everything that exists, from the smallest particle to the largest galaxy. It’s all the matter and energy in the universe.

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The cosmos is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. While the term cosmos is often used to refer to the universe, it actually includes everything that exists: the universe, you, me, everything. Therefore, when we use the term cosmos in this guide, we are referring to everything that exists.

What is the Cosmos?

The cosmos is everything that exists, everything that has existed, and everything that will exist. It is all of space and time, all of matter and energy, all of information. It is the sum total of all that is, was, and will be.

The Cosmos as the Universe

In physical cosmology, the cosmos is the universe considered as a physical entity. The term cosmos originates from the Greek term κόσμος (kosmos), literally meaning “order” or “ornament” and metaphorically “world”, and is opposed to chaos.

The Cosmos as an ordered or harmonious whole

The word “cosmos” originates from the Greek word κόσμος (kosmos), literally meaning “order” or “ornament” and metaphorically signifying “the world”. The antonym of κόσμος is ἀκόσμος (“chaos” or “disorder”). Today, the word is generally used as a synonym for the observable universe. As well as referring to the universe as a whole, the term cosmos may be used to refer to different areas within it, such as the solar system, our galaxy, and even our own Solar System.

The Cosmos as a spiritual or metaphysical concept

The cosmos is often described as the physical universe, but it can also be seen as a spiritual or metaphysical concept. In this context, the cosmos is everything that exists, both visible and invisible. It includes all of humanity, all of nature, and all of the supernatural forces that may be at work in the world.

The word “cosmos” comes from the Greek word κόσμος, which means “order” or “ornament.” This reflects the ancient belief that the universe is an orderly and beautiful place. The Cosmos is often seen as a divine or natural order that should be respected and admired.

In many spiritual and religious traditions, human beings are seen as part of the Cosmos rather than as separate from it. We are an intrinsic part of this vast and mysterious whole. This perspective can help us to feel more connected to others and to the world around us.


The cosmos is a natural or man-made environment consisting of all matter and energy, including planets, stars, galaxies, and the contents of intergalactic space. The study of the cosmos is called astronomy.

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