Agnin

Description
A hothouse planet, Agnin has scorching clouds of methane and sulfur dioxide that give the planet a pale green color in visible light. The SO2 [Sulfur Dioxide - Ed.] from volcanic activity rains down as sulfuric acid in the upper atmosphere, but this is boiled away before the liquid ever reaches the surface. Agnin's harsh environment has prevented exploration by anything except probes.

Trivia
The official Game Guide identifies the world type of this planet as rock (pg. 253).