ALMA composite image of a massive binary protostar IRAS 16547-4247. Different colors show the different distributions of dust particles (yellow), methyl cyanide (CH3CN, red), salt (NaCl, green), and hot water vapor (H2O, blue). Dust and methyl cyanide are distributed widely around the binary, whereas salt and water vapor concentrate in the disk around each protostar. The jets from one of the protostars, seen as several dots in the above image, are shown in light blue. Credit: ALMA (ESO/NAOJ/NRAO), Tanaka et al.