A Galaxy Group (image) Max-Planck-Gesellschaft Caption This is a false color image of the central region of a galaxy group in X-rays. The jet of matter blown out of the central black hole can be clearly identified by its radio luminosity (overlaid, purple-blue). Credit Image: S. Giodini/A. Finoguenov/MPE Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.