Another European 12-m antenna arrived at the Array Operations Site (AOS) at 5000 m asl. This brought the number of antennas at the AOS to 45.

This photo was taken from Mt. Chajnantor (5640 m asl). It is extremely hard to climb the mountain where there is only half as much oxygen as at sea level, but the antenna view from the top of the mountain is really fantastic.

Credit:ALMA (ESO/NAOJ/NRAO), S. Komugi (NAOJ/ALMA)