Kees de Jager in 2016 during an interview at his home on the island Texel. © 2021 De Loods mediaproducties / Stichting Beeldlijn Guest article by Prof. Ed van den Heuvel Professor Cornelis de Jager (“Kees”), world-renowned astronomer, pioneer of Dutch and European space research, inspiring teacher, great popularizer of science and fighter against [...]