I was very sad to learn that my UC Berkeley astronomy colleague Al Glassgold passed away on January 4, 2019.
I hope that a complete retrospective on his life and accomplishments is eventually published. Al and I occasionally co-taught an astronomy seminar over the years, and his expertise on the theory of young, planet-forming circumstellar disks was related to my observations of the later stages of planet formation. It was always a pleasure when he stopped by my office (or vice versa) for a chat about the latest developments in science, or simply the problems du jour of the workplace. You know, those days when something happens at work and you ask yourself if it’s just me or is what just happened wrong? Al was exactly the right person to talk to for a grounded and insightful perspective. I will miss him dearly.