Our thoughts go to the students of the Observatoire de Paris - PSL from Ukraine.

We also think of our colleagues researchers and academics in Ukraine, and in particular of the radioastronomers of the Institute of Radioastronomy of Kharkov, with whom we have been collaborating closely for almost thirty years, and who took part in the definition of the NenuFAR radio telescope on the site of Nançay and contribute to the exploitation of its observations.