Class H
From Star Trek : Freedom's Wiki
In Planetary classification, a Class H planet type is uninhabitable by Humans. In the Treaty of Armens, "unwanted lifeforms inhabiting H class worlds may be removed at the discretion of the Sheliak Corporate." (TNG: "The Ensigns of Command")
An H class planet or moon could contain an atmosphere consisting of Oxygen and Argon. (VOY: "Scorpion, Part II")
Examples of a Class H planets:
- Tau Cygna V
