Curious Binary System Seen by ALMA

Observation of the dust emission (green) and the cool gas around MM1a (red is receding gas, blue is approaching gas), indicating that the outflow cavity rotates in the same sense as the central accretion disc. MM1b is seen orbiting in the lower left. Credit: ALMA (ESO/NAOJ/NRAO); J. D. Ilee / University of Leeds.