We will introduce the ERASMUS+ program that offers mobility exchanges between IAC, Czech, and Slovak research institutes and universities. The major part of the talk will be focused on giving information about the involved institutes in CZ and SK (Astronomical Institute of Czech Academy of Sciences, Department of Theoretical physics and astrophysics of Masaryk University, Astronomy department of Comenius University in Bratislava and Astronomical Institute of Slovak Academy of Sciences) and research topics investigated here, that span from hot Be stars, exoplanets, star clusters and relativistic astrophysics to meteoroids and interplanetary matter. All institutions open wide possibilities for collaboration in contemporary astrophysics but also in instrument development.