To capture the weak signals that come from the Universe

To capture the weak signals that come from the Universe, ALMA requires a minimum presence of water vapor in the atmosphere, which is why it was installed in the heights of the Atacama desert. However, during the so-called "Altiplano winter", there are precipitations and clouds that distort the signals captured by the antennas. © Sergio Otárola - ALMA (ESO / NAOJ / NRAO)