ALMA observatory’s antennas enter the operating room in Chile

The altitude and aridity of the Atacama desert that benefit astronomy are at the same time an endurance test for the machines, after a decade of work.

RIO DE JANEIRO, BRAZIL - A truck as long as a five-story building drives slowly through the corner of the earth most similar to the planet Mars. Among the red sand mountains of the Llano de Chajnantor, in the Chilean Andes, the vehicle carries a white antenna 12 meters in diameter and weighing 100 tons. At about 5,200 meters above sea level -Madrid, the highest capital in the European Union, is at 650-, the deafening whistle of the wind is only interrupted by the whistle emitted by the truck. A man with his face completely covered stands a couple . . .

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