The image is 3.4 arcmin on a side (1 archmin is 1/60th of a degree), which corresponds to 5,700,000 light years in the universe 9.6 billion light-years away. The arrows indicate galaxies that are likely located at approximately the same distance, and these galaxies cluster around the center of the image. The cluster emits X-rays as shown by the contours. The circles show galaxies whose distances are accurately measured from the near-infrared observations and have been confirmed to be at 9.6 billion light-years away. Though the number of the confirmed members may be small, the combination of the X-ray detection and the confirmation of massive galaxies unequivocally prove a real gravitationally bound cluster.