An ALMA antenna for the first time.

An ALMA antenna en route from the Operations Support Facility to the plateau of Chajnantor for the first time. The ALMA transporter vehicle carefully carries the state-of-the-art antenna, with a diameter of 12 meters and a weight of about 100 tons, on the 28 km journey to the Array Operations Site, which is at an altitude of 5000 m. The antenna is designed to withstand the harsh conditions at the high site, where the extremely dry and rarefied air is ideal for ALMA’s observations of the universe at millimeter- and submillimeter-wavelengths. © Ralph Bennett - ALMA (ESO/NAOJ/NRAO)