CDF-S Transient • A source located in the Chandra Deep Field-South (CDF-S) that displays extraordinary properties. 11.3.24 • In 2017 a mysterious X-ray source became 1,000 times brighter over a few hours before fading dramatically in about a day. • This source was discovered in Chandra Deep Field-South data, giving one of the deepest X-ray images ever made. • Hubble and Spitzer data indicated this source is likely located in a small galaxy about 10.7 billion light years from Earth. • Evidence po