Sun was the name given to a series of starships owned by Aidulac, an immortal scientist, formerly in the employ of Malkus the Mighty of the Zalkat Union. Over the course of 90,000 years, until 2376, Aidulac used the starships Sun to track down the Malkus Artifacts. (TOS - The Brave and the Bold, Book One novella: The First Artifact; VOY - The Brave and the Bold, Book Two novella: The Third Artifact)