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The main image of Sgr A* was produced by averaging together thousands of images created using different computational methods. The images can also be clustered into four groups based on similar features. These images are shown here at the bottom. EHT Collaboration The main image of Sgr A* was produced by averaging together thousands of images created using different computational methods. Representations from four image clusters are shown in the bottom row. Thousands of images fell into each of the first three clusters, which show a ring structure. The fourth and smallest cluster contained only hundreds of images that did not appear ring-like.