I'm not really sure if the astronomer question is precise enough. I'm certain Einstein did have an interest in astronomy, and relativity is applied to a lot of astrophysical situations, but I think Einstein is known for relativity and other theories (quantum etc) before astronomy. Same could be said for Hawking, who was definitely a theoretical physicist. I wouldn't say you're wrong, I just think its too imprecise of a question. The rest was good though. The last question is funny too. The idea that maybe it was all of them crossed my mind but I thought it was stupid. Well played!