Why is it dark in space?
Freezing of particles and gases Different substances stick to the dust particles that float in space. It can be methane, ammonia, or other compounds. When exposed to ultraviolet radiation, these substances change their location. There are areas of space where galactic gas is formed as molecular clouds or particles of other gases. They may also retain elements of the ancient stellar atmosphere. These gases block most of the light in the Milky Way region, which prevents us from seeing everything that is happening in our Solar System without the necessary equipment. The gases gathered in one place also form nebulae, which block out the light of the stars from us.
The expansion of the Universe According to the Big Bang theory, according to which everything in our Galaxy was created as a result of an explosion of enormous power. This happened 13 billion years ago. But since then, the particles have been flying around the universe. Only some objects, falling under the influence of the gravitational fields of the planets, become their satellites, while the rest “surf” the vast expanses of the universe. As a result, it turns out that the objects are moving away from each other. Light sources also appear to be at a great distance and cannot be seen in all corners of the universe. As a result, the cosmos is constantly darkening and the number of black areas increases. Light, according to the conditions of physics, moves at its own speed, because from the Earth it seems that the cosmos is dark. The light emitted by a star usually travels billions of light-years, and only after crossing this path can it be picked up by human satellites.
In addition, a huge part of outer space is occupied by dark matter. It is a hypothetical form of energy that does not emit electromagnetic radiation, nor does it interact directly with it. This property makes it impossible to observe it directly. The conclusion about the existence of so-called “dark” matter is made on the basis of numerous indirect signs of the behavior of astrophysical objects and the gravitational effects created by them. The composition of dark matter can include many already discovered space objects, for example, brown dwarfs, massive planets, compact bodies in the last stages of evolution, neutron stars, black holes. Moreover, hypothetical objects such as quark, preon, and other stars may also be a component of baryonic dark matter.
By the way, our planet would be dark day and night, if not for the properties of its atmosphere. Many people think that in the dark, nothing is visible, because the Sun does not shine. But the answer is not connected with the sun, because it also illuminates the surface of the Moon, but for some reason there is no day on it. The mystery lies in the ability of the atmosphere of our “blue planet” to dissipate solar energy. At night, we are dark, because the light of bright stars does not “reach” us, and others simply do not have enough brightness to compare with the Sun. In addition, they are “blocked” from us by cosmic dust and gas accumulation, and we see all objects through a telescope, which does not” catch ” everything. Most of this space remains outside the lens or is “colored” in our eyes in a darker color. But this is how objects look from the Ground. In space, the “blackness” is a kind of perfect emptiness that stretches to infinity, beckons, scares and fascinates.