Keempo Expanse

The Keempo Expanse was a region of space between the territories of the Goeg Domain and the United Federation of Planets. The closest distance between the Domain and Federation borders were 100 light-years. The Nystrom system lay on the Domain side of the Keempo Expanse. 

History
In 2267, the USS Enterprise (NCC-1701) was the first Federation Starfleet starship to traverse the Keempo Expanse and make contact with the Domain during a deep space assignment.