MRG-0138_composite_V2

This composite image of galaxy cluster MACSJ 0138 shows data from the Atacama Large Millimeter/submillimeter Array (ALMA) and NASA’s Hubble Space Telescope. The magnified section shows a bright orange/red dot, which traces cold dust observed in radio using ALMA. This cold dust helps scientists to understand, by inference, the amount of cold hydrogen gas—required for the formation of stars—present in the galaxies in the cluster. Credit: ALMA (ESO/NAOJ/NRAO)/S. Dagnello (NRAO), STScI, K. Whitaker et al