File:JKCS 041.jpg

This is a composite image of the most distant galaxy cluster yet detected. This image contains X-rays from NASA's Chandra X-ray Observatory, optical data from the Very Large Telescope (VLT) and optical and infrared data from the Digitized Sky Survey.

Credits: X-ray: NASA/CXC/INAF/S.Andreon et al. Optical: DSS; ESO/VLT