What is a web space?
Looking at the night sky, it seems that the stars and galaxies are more or less randomly. This, however, is not quite so. Despite the chaos, the universe - it is not an accidental mix-up objects. It may seem surprising, but the universe has a structure consisting of filaments massive galaxies separated by giant voids. Scientists call this structure cosmic web. But why is it so strange? The answer probably lies in the processes that occurred in the first few hundred thousand years after the Big Bang.
Here is the cosmic web
What is the Sign in galactic filament?
You and I are incredibly lucky. At least, that is considered an outstanding theoretical physicist Stephen Hawking. According to the scientist, even though we live in the ordinary world that revolves around the unremarkable star, we have a chance to know the universe. Today, not only a map of the nearest exoplanets to Earth, but also the entire observable universe. And if one look at a map you start a little dizzy, then get ready for this attraction.
Here is a map of the observable universe. It can drive you mad, right?
To try to imagine the approximate scale of what is happening, let's start the countdown of the Milky Way galaxy. Our nearest galactic neighbors, is the Andromeda Galaxy and the Triangulum Galaxy. And about 50 galaxies local group. The Hubble Space Telescope has repeatedly photographed the inhabitants of these amazing space. But do not forget that the universe is expanding, and therefore galaxies fly apart from each other in a variety of directions. We recently wrote about the fact that cosmic expanse that just does not happen, including the collision of three galaxies together.
So look 15 000 galaxies in the Hubble telescope lens
However, in addition to the galaxies of space open spaces there are nebulae, star clusters, galaxy clusters and superclusters of galaxies even. Some of these objects in the observable universe were identified by astronomers in the large-scale structure because of its incredibly large size. The largest of them stretch for hundreds of billions of light years. Because of its elongated shape, these objects were called galactic filaments. These filaments are intertwined, fill an empty space - or voids (from the English "void"), as if forming a three-dimensional web. But that's not all - Sign galactic filaments can form a "Great Wall" - a relatively flat complexes clusters and superclusters of galaxies.
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Supercluster of galaxies and great walls
If supercluster, there are more than 100 000 galaxies, such a supercluster called laniakea supercluster, which is translated from the Hawaiian language means "the vast heavens." Beautiful name, is not it? The diameter reaches laniakea supercluster 500 million light-years. And so you can better imagine its scale, we recall that the diameter of the Milky Way galaxy is about 100,000 light-years.
laniakea supercluster supercluster galaxies and near the Perseus-Pisces look like this
Thus, the space network consists of interconnected strands grouped galaxies and gas, stretched across the universe and separated giant voids. The biggest of the detected structures today is the Great Wall of Hercules - Corona Borealis, which has a staggering 10 billion light-years in diameter and contains several billion galaxies. As for the voids, the biggest is the Void FAC, named after the astronomers Keenan, Barger and Cowie. The diameter of the FAC is 2 billion light-years.
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In general, these features give the universe a little frothy appearance. However, it is necessary to reduce the scope of how this pattern disappears, and the universe resembles a uniform piece of galaxies. Astronomers have a name for this delightful sudden uniformity - Late Majesty (End of Greatness). On a smaller scale, however, we can see the structure of the universe. But how did this structure?
It all started with the Big Bang
About 14 billion years ago the Big Bang gave birth to our universe. In early universe extremely small particle-antiparticle pairs arose spontaneously and destroying each other. Thus, the space itself is like a "boiled". Usually these particles pair destroy each other, but rapid expansion of early universe is prevented. With the expansion space, these vibrations also increased, causing the difference in the density of the universe.
Watch the video below to better understand the real dimensions of the universe
Since the matter attracts matter under the force of gravity, these differences explain why matter "stick together" in some places and not in others. However, this does not fully explain the structure of the cosmic web. In the first 10-30 seconds after the Big Bang the universe was full of the primordial plasma, agglomerated together due to the aforementioned differences. When this material stick together, it created pressure that counteracted gravity, creating a ripple, like a sound wave. Physicists call these pulsations of baryon acoustic oscillations. Simply put, this ripple is the product of ordinary matter and dark matter. As you know, the dark matter - is the most mysterious structure in the universe. In general, these and many other processes such as the interaction of normal and dark matter space generated web, which is a structure of the universe. Of course, there are many other processes that have affected the cosmic web, but we will tell you some other time. In the end, from that described above can be a bit dizzy. It would not have tried, we can not realize the scale of the universe like. At the same time, an understanding of where we are with you all the same are, can help to look at the world a little differently.