GaiaNIR, our next astrometric mission (in the IR)

The All-Sky Visible and Near Infrared Space Astrometry GaiaNIR mission, built on Gaia principles, began his official journey on 2019 with the publication of the first white book. Two years later, on 2021, the ESA Science Programme Voyage 2050 selected the global astrometry in the near Infrared (NIR) as a key theme. The roadmap for the future μas astrometry in Europe is on the way! Peering through the dust, with a wavelength cutoff in the K-band, GaiaNIR will observe at least 5 times as many stars as Gaia. Furthermore, combined with Gaia and other space missions (e.g. Euclid and Jasmine) it will give a baseline of 25-35 years thus improving proper motions in a factor of 14-20 better that Gaia. With this potential accuracy, the dynamical evolution of the Milky Way will be traced looking at the inner bulge and bar and, at the same time, using traces out to 100 kpc with a potential accuracy of 2-3 km/s. Finally, GaiaNIR proper motions will also allow the study of massivelocal group galaxies. These are only examples of the extremely broad potential science cases of GaiaNIR, a mission that, as Gaia, will cover nearly every brach of astronomy.