This is a forum to discuss space, science and technology. Please use it if you want to talk about these topics with others. However, I will reject articles that do not fit these topics and methodology. Such posts will be moved to the 'hidden' bulletin board. Please understand that there may be errors in my judgment regarding topics that are beyond my level of knowledge. Also, please treat each other with courtesy. I will manage this bulletin board myself, and I will always keep open the posts here, even if one day I can no longer do it.