Vitriol

Vitriol is the second and most hostile planet in the Arwell System.
==Physical Characteristics==
After formation, Vitriol had only a solid global crust with no way to release pressure that built up underneath it. After a few millenia the crust started to break up and released a massive amount of pressure by explosive volcanic activity. This resulted in a global resurfacing event and huge calderas formed on the surface. Nowadays Vitriol's volcanoes are dormant, but for how long? 
Some believe that Vitriol was formerly a large "gentle giant", but as there is no mechanism to strip off the gas this theory is mostly ignored. 
==Atmosphere==
Aside from the very surface layers, the atmosphere of Vitriol is in a state of vigorous circulation. The upper layer of troposphere exhibits a phenomenon of super-rotation, in which the atmosphere circles the planet in just four days, much faster than the planet's sidereal day of 40 days. The winds supporting super-rotation blow at a speed of 40 m/s or more. Winds move at up to 60 times the speed of the planet's rotation, while Teralla's fastest winds are only 10% to 20% rotation speed. On the other hand, the wind speed becomes increasingly slower as the elevation from the surface decreases, with the breeze barely reaching the speed of 10 km/h (2.8 m/s) on the surface. Near the poles are anticyclonic structures called polar vortices. Each vortex is double-eyed and shows a characteristic S-shaped pattern of clouds. Above there is an intermediate layer of mesosphere which separates the troposphere from the thermosphere. The thermosphere is also characterized by strong circulation, but very different in its nature—the gases heated and partially ionized by sunlight in the sunlit hemisphere migrate to the dark hemisphere where they recombine and downwell.
==Silne==
Silne is the first and only moon of Vitriol.
===Physical Characteristics===
Silne is similar in size and shape to Vas, a dwarf planet orbiting Verda. It is believed to have formerly been larger before some kind of disruption placed part of its orbit beneath Vitriol's roche limit. Gravitational interactions between Silne, Vitriol, and Arwell are slowly increasing the eccentricity of Silne's orbit, and in a few million years it will impact the planet, potentially breaking open the crust and causing another resurfacing event. 
===Biomes===
Silne has four biomes.
*Lowlands
*Midlands
*Bulges
*Impact Craters
==Biomes==
Vitriol has six biomes.
*Sulfuric Oceans
*Shoreline
*Calderas
*Volcanic Terrain
*Volcanic Highlands
*Polar Area
Category:Minmus' Articles
Category:Arwell System
Category:Planets
Category:Verdan Federation