The Kavis Alpha sector was a region of space. Within this sector, there was an unnamed binary system, which consisted of a neutron star and a red giant, and Kavis Alpha IV. The neutron star went through a cycle of sucking matter from the nearby red giant, then explosively expelling the matter into space, every 196 years.
In 2366, Doctor Paul Stubbs recorded this historic event, from the USS Enterprise-D, using a customized probe known as "The Egg." After this event, the Enterprise-D seeded a nanite colony on Kavis Alpha IV. (TNG: "Evolution")