A group of scientists has hypothesized that the Milky Way is a contiguous part of a “supercavity,” a vast region of the local universe that is unusually low in matter. According to experts, this assumption could help solve one of the key problems in modern cosmology: explaining the differences in the value of the Hubble constant at different stages of the development of the universe. According to information from the University of St. Andrew in Scotland, this hypothesis suggests that the universe may be expanding faster than normal relativity suggests. However, further studies and experiments are needed to confirm this hypothesis.
The Hubble constant plays an important role in cosmology, determining the expansion rate of the universe and its age. Its value decreases over time. This means that the universe is expanding more slowly than before. However, the actual value of this constant in our region does not correspond to calculations since the Big Bang, resulting in a difference of 7-8 km/s/Mp, making it a cosmological mystery. Recently, the idea that the Milky Way lies at the edge of a huge cavity about 60 megapixels (about 200 million light years) in size has been floated. According to this hypothesis, dark matter forms galaxies in the form of networks of filaments and nodes, which combine into clusters and superclusters.
In this “hypercavity,” matter is concentrated along the boundaries of the “void bubble,” which may explain some of the discrepancies. Due to the structural features of this region, the expansion rate of the universe in our region is likely to be higher than that detected by measurements of the cosmic microwave background radiation. However, this assumption contradicts Einstein’s theory of general relativity. In this context, scientists applied modified Newtonian mechanics (MOND). Computer models assume that a “hypercavity” exists (and that we are inside it) and can adjust the data, requiring changes to some principles of general relativity. I showed you something.