If someday rockets should open the gates to space, then we must be oriented as to its environmental conditions and their possible biological effects. To study this, and to find means of protection, is one of the tasks of space medicine.
For a warrior, to be inaccessible means that he touches the world around him sparingly. And above all, he deliberately avoids exhausting himselfand others. He doesn't use and squeeze people until they have shriveled to nothing, especially the people he loves.