Scientists do not strive for simplicity; therefore, even outer space does not embrace a single concept, but is divided into several categories. And do not think that it is a question of emptiness, because even in these open spaces there are space objects. Let's take a closer look at this topic.
Outer space and its types
We roughly understand what the Universe is, but we often misuse concepts. For example, the cosmos we call everything that we see outside the Earth. But it will be more accurate to say that outer space is a relatively “empty” universe space, which is beyond the limits of the atmospheric feature of celestial objects.
We took the word “empty” in quotation marks, because in such territories you can find small amounts of oxygen, interstellar matter, cosmic and electromagnetic rays, as well as not yet detected dark matter. There are three types of space: interplanetary, interstellar and intergalactic.
The boundaries of the solar system, beyond which interstellar space begins That's right, this is the outer space between the planets. More specifically, we are confronted with a “void” that is limited to by the orbital path of the most distant planet from the star. It contains various gas components, plasma, dust, electromagnetic rays of the sun and the radiation of other celestial bodies.
If we take our system, then we consider the near-solar interplanetary space. Previously, Pluto’s orbit served as a boundary, but in 2006 this object was transferred to the discharges of dwarf planets. Therefore, now we consider the eighth planet - Neptune.
Stars huddle in galaxies and between them there are also huge empty areas or interstellar medium. In such areas, dust, gas, electromagnetic fields, cosmic rays and dark matter are observed (not yet found).
The interstellar medium constantly receives various products of nuclear fusion, since at the final stage of life a star drops its outer shell with all the elements. For the first time, the term itself in 1626 was used by the philosopher and historian Francis Bacon.
Interstellar space is devoid of uniformity, since it is possible to meet various nebulae, globules and large-scale molecular clouds. The interstellar medium itself is characterized by low density and optical subtlety.
Our beloved galaxies must exist somewhere, so there are also cosmic regions between them. This is an interesting type of space, because it is practically devoid of matter. That is, in terms of composition, we almost manage to observe absolute vacuum. You can find only incredibly rarefied ionized gas.
Here there are high temperatures - tens of millions of degrees. Electromagnetic rays of black holes, stellar wind, and supernova explosions are called heat sources. Also found intergalactic dust, which was found only in 1949.
As you can see, even the imaginary emptiness of outer space deserves the great attention of scientists, and what can we say about the rest of the infinite Universe with its amazing objects.