of course I know that google knows the answer to any question, but it seems that there are limits. So when I want to test a certain hypothesis I need to have an overview of all known supernovaes, distance, size, etc, dated from say 30-50,000 years ago. So I typed in super nova index and that sort of thinks, and the result was millions of them, pop groups, games, clubs, anything, the whole nine yards except a single super nova index. There must be an answer to the question, but how to ask to correct question. Can anyone help?