Almost a decade after starting observations of the sky in the northern hemisphere, the QUIJOTE Collaboration has presented an initial series of 6 scientific articles, giving the most accurate description we have of the polarization of the emission of the Milky Way in the microwave range. This is a window of observation not previously explored, which provides complementary information to that obtained previously by space missions (Planck and WMAP) dedicated to the study of the cosmic microwave background radiation (CMB), the fossil radiation left behind by the Big Bang. The new results allow

An international scientific team, in which the Instituto de Astrofísica de Canarias (IAC) participates, has discovered a large reservoir of hot gas in the still-forming galaxy cluster around the Spiderweb galaxy. The finding reveals that this protocluster, far from dispersing, will end up gravitationally bound for the rest of its existence. Located at an epoch when the Universe was only 3 billion years old, this is the first time such a hot gas has been detected at such distances. The study, published in Nature, confirms that galaxy clusters, one of the largest known structures in the