Supercluster

A supercluster is a large group of smaller galaxy clusters or galaxy groups that are gravitationally bound together and form the largest known structures in the universe. These massive structures can span hundreds of millions of light-years and contain thousands of galaxies. Superclusters are not necessarily bound by gravity and may dissolve over time due to the expansion of the universe. The concept of superclusters helps astronomers understand the large-scale structure of the cosmos. In Hebrew, a supercluster is known as מִגְדּוֹר גַּלַּקְטִי (transliteration: Migdor Galakti). In Russian, it is called сверхскопление (transliteration: sverkhskopleniye), and in German, it is referred to as Galaxienhaufen-Supercluster or simply Superhaufen. Key examples of superclusters include the Virgo Supercluster, which contains the Local Group with our Milky Way galaxy, and the Shapley Supercluster, one of the most massive structures known.