In the ALMA array of antennas there are 16 antennas from Japan, 12 of which have disks seven meters in diameter that make up the Atacama Central Array (ACA), also known as the "Morita Set" in honor of the scientist Koh'ichiro Morita . ACA antennas serve a specific function within the array and do not change position like the rest of the antennas. © Juan Carlos Rojas - ALMA (ESO / NAOJ / NRAO)
Here goes image description