Realspace, known by the Vagaari as crawlspace, referred to the universe as viewed from an observer traveling slower than the speed of light. Filled almost entirely with vacuum, but containing stars, planets, and other astronomical bodies, it was the dimension within which Humans and nearly all other inhabitants of the galaxy lived. Other distinct dimensions are: hyperspace, through which starships could travel faster than light and otherspace, the home dimension of the Charon species. Realspace was usually referred to simply as space by those living within it. Traveling in particularly isolated areas of space known as deep space for extended periods of time led to the condition known as deepsick which caused mental and emotional breakdown.