The QUBIC observatory is a Cosmology project to study the ultrafast expansion of the universe in the initial moments by measuring the B modes of the polarization of the Cosmic Microwave Background, for this the sky is observed with a millimeter wave Radio Telescope Interferometer.[1]​.

In 2022, the first module began operating in the area of ​​Alto Chorrillos, Province of Salta, Argentina.

The cosmology project QUBIC (Q-U Bolometric Interferometer for Cosmology or Q-UBolometric Interferometer for cosmology) observes the sky with a millimeter-wave radio telescope interferometer. It will combine interferometry with the use of bolometer detectors: it observes the sky at frequencies of 150 and 220 GHz, in order to separate the cosmological signal from the foreground emission, in particular, the emission of thermal dust.[2][1]​.

On October 26, 2022, it began operating in Argentina, in Alto Chorrillos, Province of Salta, at 4,980 meters above sea level. n. m.. The complex has been built in France in collaboration with Argentina, Italy, the United States, the United Kingdom and Ireland, to verify the existence of signals that would have been generated at the moment of the creation of the universe. The location was chosen for numerous parameters: excellent visibility of the sky, meteorological aspects (among them the very low relative humidity of the air, since humidity affects the sensitivity of the instrument), geology, accessibility and the possibility of incorporating local personnel.[1]​[3]​[2]​.

The QUBIC works with low energy radiation of the electromagnetic spectrum. It is enclosed in a cylindrical housing or cryostat 1.8 m high and 1.6 m in diameter, globally cooled to about 4 kelvin (corresponding to -269.15 °C), but the bolometric sensors must work at temperatures numerous times lower, so the design of the cooling system combines two types of liquid helium.[1][4]​.

Pierre Auger Observatory.