Vultra was a planet located in a star system with a red star that was adjacent to the system containing Crucial III.
In the 23rd century, Vultra's star was dimming, slowing changing Vultra from a class M world into a class P wasteland. The scientifically-advanced Vultrans sought some way to save their civilization from an ice age and extinction while habitats of the more savage Valtarii became buried under snow and ice.
In 2266, Captain James T. Kirk and Leonard McCoy helped the Vultrans abandon the planet in interplanetary arks. (TOS comic: "The Crucial Element")
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