A log is a cool idea but I don't think it's practical for me to implement, I'm afraid. As well as being a lot of work to implement, it would also mean the game was storing a growing amount of information, which can cause performances issues in a Twine game like mine. A glossary with descriptions of everything you can discover was something I thought about implementing, but decided it would be too big a job for not much benefit -- I think most of the trait names are fairly self-explanatory, and if you want to know what a real space thing like a dwarf star is you can look it up elsewhere.