Galaksijoukko
Galaksijoukko, also known as a galaxy cluster, is a large-scale structure in the universe consisting of hundreds to thousands of galaxies bound together by gravity. These clusters are the largest known gravitationally bound structures in the universe, and they are often found at the intersections of filaments in the cosmic web, the large-scale structure of the universe.
Galaxy clusters are primarily composed of dark matter, with ordinary matter (baryonic matter) making up a smaller
The dynamics of galaxy clusters are influenced by the presence of dark matter and dark energy. The
Galaxy clusters are important for studying the large-scale structure of the universe and the properties of