This video sequence pinpoints the seven X-ray sources [supermassive black holes] discovered in the southern field with the Chandra X-ray Observatory that cannot be seen in the Hubble view. The sequence begins with a view of the full Chandra field. Small boxes appear which pinpoint the black holes [the red blobs]. The video then zooms into the Chandra field to show close-ups of two black holes, which disappear in the Hubble image. These black holes are the most distant ever detected, or the galaxies in which they reside are so dusty that they cannot be seen.