Minara

Minara was the primary of the Minarian system.

This star supernovaed in 2268. Its counterpart in the antimatter universe was located twelve degrees south of the galactic plane.

At that time, the star system included at least two planets – one was used by the Vians, the other was the homeworld for Gem's people. 

While inhabiting the body of Dr. Janice Lester in 2269, James T. Kirk referred to events immediately preceding Minara's supernova in an attempt to convince Spock of his identity. 

In 2270 the USS Enterprise (NCC-1701) set course for the dead star in the antimatter universe that corresponded with the Minara supernova, where it emerged back into the familar "positive matter universe."