Bobby finished writing the descriptions of spiral galaxies, barred spirals, and irregular galaxies – spirals and barred spirals have a higher concentration of younger stars and gas and dust than ellipticals (Bobby completed the material on ellipticals last week), while irregulars are usually considered to be the remnants of catastrophic galactic collisions. Bobby then very politely asked if he could join his friends for the rest of class, since they were all playing a game - I of course allowed him to, since he had worked so well. In any case, the game - Apples to Apples - can be a very educational game, especially considering that the coordinator was teaching the definitions of the words as they popped up. From time to time, one of the teachers would contribute a deeper definition of a word, in say, a scientific context.