I always find it hard to come up with something to say when somebody has died, whether in one's personal life or in the realm of celebrities, that isn't a cliché or a throwaway. So I'll say this instead: I just find it amazing how someone you have never met personally (at least I haven't, sadly) can become a part of your life just by their presence in a TV show and some movies, so much so that you're saddened by their loss. But that is the case with Nichelle - and indeed all the cast of TOS. It goes to show the power of filmmaking, and Star Trek in particular, that these images are a permanent record of these people's work and talent and personalities and therefore, as was said, like the light of long-dead stars that comes from thousands of lightyears away and is therefore never really gone.