What is the Large-Scale Structure of the Cosmos?

Large-scale structure in physical cosmology refers to the mass and light distribution characteristics of the observable universe over a large range (typical scale is one billion light years). Surveys and depictions of sky surveys and various electromagnetic radiation wavelengths, especially 21 cm radiation, have acquired many content and characteristics of the structure of the universe. The structure of the structure seems to follow a model of hierarchy, with the scales of super galaxy clusters and fibrous structures as the uppermost layer. No matter how large, there is no continuous structure. This refers to the end of greatness phenomenon.

Large-scale structure of the universe

The results of galaxy surveys show that our universe appears to show a "bubble network" structure. Almost all galaxies are distributed in narrow "fibrous bands", and in their middle are huge holes, known astronomically as "

The organizational dispute over the structure begins

End of Greatness is a scale found in observations, roughly a 100 million second gap (300 million

Another large-scale structural evidence is Lyman alpha forest . This is at

In an attempt to build

Based on years of exploration, there are as many as one billion galaxies (outer galaxies) that humans can observe. The Andromeda Galaxy alone contains 200 billion planets. So the planet is just a drop in the ocean. There are as many stars in the universe as sand on the beach, and they are uncountable. So it is not an exaggeration to say that the universe is boundless.

Concerning the mystery of the universe scale, German philosopher Kant proposed the famous "space-time paradox", emphasizing that people's understanding of the finite and infinite universe must be contradictory. And Einstein proposed the finite universe model in 1917, he proposed: "The universe should be regarded as a closed continuous area that is limited in spatial scale." And on the premise of the uniform distribution of cosmic matter, a four-dimensional continuum "unbounded and finite" and "limited and closed" was constructed mathematically. That is, the universe is a closed "cosmic sphere". According to this view, light emitted at any point in the universe will return to its starting point after 10 billion years along the surface of space-time. Such a wonderful doctrine cannot be fully understood yet. Is space-time curvature positive or negative? Or is it zero (Ai Shi himself tends to agree that a positive curvature exists)? One cannot answer exactly. However, when a scientist in the United States used an electronic computer to observe cosmic light, he did see a ring-shaped light emitted by a galaxy, which undoubtedly supported and verified Einstein's "cosmic sphere" theory. Finally, there is still time to explore issues such as the scale of the universe. But it can be said that the knowledge of the universe is endless.