- Chandra :: Galaxy Clusters and Dark Energy
A galaxy cluster is comprised on hundreds of galaxies embedded in a cloud of extremely hot gas and dark matter. Dark matter, an invisible and unknown type of material, is postulated to hold clusters together. X-ray observations have the unique ability to determine the ratio of the mass of the hot gas and the mass of the dark matter in a cluster. The observed values of the gas fraction depend on the assumed distance to the cluster.
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- Chandra X-ray Observatory Photo Album
Photo Album Discover the images of the Chandra X-ray Observatory. Dive into the wonder of everything from Black Holes to X-ray Binaries. Below you can find various ways to find just the image you are looking for.
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