Επισκέπτης

ENSI Caen, Γαλλία

Scripps Institution of Oceanography, University of California, CA, ΗΠΑ

University of Toronto, Καναδάς

Head of the Office of the Executive Director, European Union Agency for the Space Programme

University of Naples Federico II, Ιταλία

California Institute of Technology (ΗΠΑ)

IAS - Université Paris-Saclay, CNRS, Γαλλία

Washington State University, ΗΠΑ

University of Geneva, Ελβετία

Univ. of California - Berkeley, ΗΠΑ