Not a good place for novices as the best answers are often downvoted whilst the worst rise to the top. If you have no knowledge of the subject you are asking about you will not notice this and end up being misinformed. However, if you are already familiar with a subject and just want further specific details, it can be useful as there are some good, knowledgeable contributors. Put bluntly, there are too many geeky sci-fi fans posting on hard science and engineering subjects they have zero experience of, who get angry when corrected on their ignorance and downvote their superiors. Poor moderation allows this behaviour to prosper.