Radio observations (IMAGE) Royal Astronomical Society Caption Radio observations of Stephan's Quintet at different frequencies, taken by the Low Frequency Array (LOFAR) and the Very Large Array (VLA). The red colours indicate strong radio emission coming from the shock front, as well as from some of the galaxies in the group and beyond. Credit University of Hertfordshire Usage Restrictions No restrictions. License Public Domain 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.