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A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, [1] with typical masses ranging from 10 14 to 10 15 solar masses.
Galaxy clusters are the largest gravitationally bound objects in the universe, composed of galaxies, plasma, and dark matter. Learn how astronomers study their structure, evolution, and interactions using X-rays, microwaves, and gravitational lensing.
Cluster of galaxies, Gravitationally bound grouping of galaxies, numbering from the hundreds to the tens of thousands. Large clusters of galaxies often exhibit extensive X-ray emission from intergalactic gas heated to tens of millions of degrees.
Clusters of galaxies are the most recent and most massive objects to have arisen in the hierarchical structure formation of the Universe and the study of clusters tells one about the way galaxies form and evolve.
23 Σεπ 2021 · Learn what galaxy clusters are, how they are formed, and how they are studied by NASA scientists. Galaxy clusters are the largest objects in the Universe, held together by gravity and dark matter, and containing hot gas, stars, and galaxies.
Learn about galaxy clusters, the largest gravitationally bound objects in the universe, from Chandra's observations and animations. Find out how galaxy clusters are used to investigate dark matter and dark energy, and explore their X-ray sources and features.
Definition. A galaxy cluster is a large grouping of galaxies that are bound together by gravity. These clusters can contain anywhere from a few dozen to thousands of galaxies, along with hot gas and dark matter, making them the largest known structures in the universe.
