It took him about 30 years to earn that PhD (an impressive feat of endurance in itself) because he was slightly distracted by other things when he was supposed to have been studying full time at uni!
@LunadelobosIAMTHEDRAGON Absolutely. He's a great advertisement for lifelong learning. I don't know much about astrophysics, but whatever his original thesis was he must have had to revise it several times to keep up with new research 🌠
