Universe It comes from the Latin "universus". It is usually defined as the set of all created things (if created in creation), or of all things that exist.
We usually use words such as "universe", "universal" or "universality" to refer to a fact or idea that encompasses everything, although, often, we refer to something that does not go beyond our planet, such as "a universe of options, or when we name a "universal" artist, or we refer to the "universality" of laws, phenomena or cultural events.
In these cases, although we obviously refer to the scope of our planet, we continue to express an idea of totality.
When we talk about the astronomical Universe it seems more appropriate to refer to it with the Greek word "Cosmos".
Although in many dictionaries we can find exactly the same definitions for both terms, there is a difference in nuance: "Cosmos" seems limited to matter and space, while the concept of "Universe" also includes energy and time.
In this chapter we will discuss the basic aspects of the Universe: what it is, how it is observed and what its fundamental laws are.
In this chapter:What is the Universe ?: The Universe is everything, without exceptions. Matter, energy, space and time, everything that exists is part of the Universe ... Read pageObservation of the Cosmos: Since its origins, the human species has observed the sky. First, directly, then with telescopes ... Read pageThe constellations: The stars that can be observed on a clear night form certain figures that we call "constellations" ... Read pageMeasures of the Universe: Not only distances, mass, volume, density, temperature can be measured . The Universe also measures the ... Read pageThe laws of the Universe: No one has imposed them, but the Universe seems to be governed by rules or laws that scientists have ... Read page