FRANEKER, NETHERLANDS - JUNE 13: King Willem-Alexander and Queen Maxima of The Netherlands visit the Planetarium their regional tour of north west Friesland province on June 4 2016 in Franeker, Netherlands. (Photo by Michel Porro/Getty Images)
FRANEKER, NETHERLANDS - JUNE 13: King Willem-Alexander and Queen Maxima of The Netherlands visit the Planetarium their regional tour of north west Friesland province on June 4 2016 in Franeker, Netherlands. (Photo by Michel Porro/Getty Images)