Space definitely attracts interest.Only one thought that life can exist somewhere there excites our consciousness. It helps us look into infinity and understand how amazing and unexplored our world is. But not only views, but also galaxies can attract space. In the sense that there is a force in the world that makes the galaxies move in a certain direction. It is noteworthy that scientists believed that groups of galaxies should move randomly regardless of anything. However, using data for 3 years, the researchers found a strange pattern. Could this be a hardware error, or is it really something mysterious?
- 1 What is a dark stream?
- 2 Where are the galaxies going?
- 3 Difference between dark flow, dark matter and dark energy
- 4 The nature of the dark stream
What is a dark stream?
Dark stream is a cosmological phenomenonwhich has been the subject of much debate and research in the field of astrophysics. It refers to the mysterious, constant movement of clusters of galaxies in a certain direction, which is not explained by the standard cosmological model.
The standard cosmological model suggeststhat the universe is homogeneous and isotropic, that is, the physical properties must be the same regardless of their direction on large scales. However, observations have shown that clusters of galaxies are moving in a preferred direction, known as the dark stream.
Dark stream was first discovered in 2008a team of researchers led by Alexander Kashlinsky from the NASA Goddard Space Flight Center. They used data from the Wilkinson Microwave Anisotropic Probe (WMAP) to study the movement of galaxy clusters on a large scale.
See also: The JUICE spacecraft was launched into space to search for life on the moons of Jupiter.
Where are the galaxies going?
But on a smaller scale, there can be veryinteresting dynamic. For example, our own galaxy, the Milky Way, is on a collision course with our nearest neighbor, the Andromeda galaxy. In about five billion years, our galaxies will collide in a titanic confrontation, and if our descendants are around to see this spectacle, it will be quite impressive.
In addition to this movement, both the Milky Way and Andromeda are moving towards the Virgo Cluster, a dense space city containing about a thousand galaxies.
And that is not all.The Milky Way, Andromeda, the Virgo Cluster itself, and all the other galaxies in the nearby region of space are moving together towards an even larger cluster, the Norm Cluster, located in a region of space known as the Great Attractor.
This is where things get more complicated.The further we go in our observations, the more difficult it becomes to accurately determine the movements of galaxies. Also, astronomers are really good at measuring the movement of galaxies towards or away from us (based on the displacement of light from the galaxies), but calculating movements in other directions is much more difficult. So one has to rely on computer simulations to make an educated guess.
While most observations of the larger universesupport the "expanding uniformly in all directions" view, some inconsistencies have arisen. In some observations, a tiny, barely perceptible movement was noticed, which can be missed. It appears that many galaxies may be moving in a preferred direction rather than just uniformly outward.
Thus, the team of researchers anddiscovered that clusters of galaxies are moving towards the region of the sky near the constellation Centaurus at a speed of about 600 km / s. This movement is not explained by the gravitational pull of nearby structures or by the expansion of the universe, leading to speculation that some other unknown force may be at work here.
To explain the dark flow, have been proposedvarious theories. One is that it is caused by the gravitational pull of massive structures outside of the observable universe, which are pulling clusters of galaxies in a particular direction. However, this explanation remains controversial, as it is difficult to prove or disprove the existence of such structures.
Another possibility is that darkthe flow is a remnant of the early universe when it was not homogeneous and isotropic. This theory suggests that the dark stream may be a signal of primordial gravitational waves that may have caused an asymmetry in the initial conditions of the universe.
Space exploration sometimes leads to unexpected discoveries: scientists have discovered an early unseen event - an escaping black hole.
Difference between dark flow, dark matter and dark energy
The scientific community is very fond of the dark, especiallycosmology. This explains such names, but it is important to distinguish them for a full understanding. Dark flux, dark energy, and dark matter are three distinct but related phenomena that are currently at the forefront of modern astrophysical research. Although these three concepts are often confused with each other, they represent different aspects of the structure and evolution of the universe.
Many people have heard about the mysterious darkmatter, and so far, scientists have only heard, because it is not so easy to find it - it does not interact with electromagnetic waves and is not visible through telescopes. But there is something that completely betrays it - the gravitational effect on visible matter, such as galaxies and their clusters, this confirms its presence. Dark matter makes up about 27% of all matter in the Universe, while ordinary matter only occupies 5%, and dark energy 68%. But its nature is still unknown, and physicists and astronomers continue to study it.
Dark energy, on the other hand, is responsible foraccelerated expansion of the universe. It acts as a repulsive force that opposes gravity and causes the universe to expand faster and faster. But its nature also remains a mystery.
Well, we talked about the dark stream above.
The nature of the dark stream
There are many hypotheses related to thisphenomenon, but most researchers argue that the dark stream arose in the earliest moments after the creation of the universe. Astronomers believe that this happened just a fraction of a second after the Big Bang, even before the period of inflation - a short time when the universe began to expand at an incredible rate. However, the nature and origin of this phenomenon is still a mystery and hidden outside of our observable universe.
One of the models based on string theory,offers an interesting variation that fits all the known facts. According to this model, our universe may have a twin universe that emerged after the Big Bang and exists in parallel with ours.
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Despite a lot of research, nature andthe origin of the dark stream is still unclear. To fully understand this intriguing phenomenon, further observations and studies of the large-scale structure of the universe are required.