Vissia Prime was a class M planet in the Vissia system and the homeworld of the Vissian people. The planet's atmosphere was thick enough so that the sun could be viewed without squinting.

In 2156, the Enterprise visited Vissia Prime so that Jonathan Archer and T'Pol could request that the Grand Moot bring Vissia into the war. (ENT - The Romulan War novel: To Brave the Storm)

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