ALMA image of Arp 220 cores

ALMA image of Arp 220 cores. The two cores (yellow), obscured by dust on visible wavelengths, observed by ALMA. The research team detected a bipolar outflow from the western nucleus and measured its velocity. In red, the North section of the outflow, particles are moving away from Earth. In blue, the South section of the outflow, particles are moving towards Earth. Credit: L. Barcos-Muñoz, N. Lira, J. Pinto - ALMA (NRAO/NAOJ/ESO)