Sad news indeed.
He was my hero when I was studying!
In my fifth year at Grammar school, inspired by him, I asked to sit the Astronomy O-level examination on a self-taught basis, as did a couple of my classmates.
I passed the exam with an 'A' grade and, along with the Chemistry prize, won the specially-created Astronomy prize that year!
It raised a few eyebrows when the additional subject was announced at the prizegiving ceremony!