Perkuna

Part of the Perkuna-Dianma binary planetary system, sharing a common orbit around the sun while gravitationally bound to each other. Despite their identical distance from the star, they have vastly different environments due to their atmospheres, geological activity, and interactions with each other. Perkuna is a superheated volcanic world, while Dianma is a cold, ice-covered ocean planet with a subsurface liquid water layer.
Perkuna – The Volcanic Super-EarthSize: ~1.3 Al'ard radius, ~2.1 Al'ard mass
Surface Gravity: ~1.4 g
Atmosphere: Thick, primarily carbon dioxide (CO₂), sulfur dioxide (SO₂), and nitrogen (N₂), trapping heat and creating a powerful runaway greenhouse effect.
Temperature: 500°C (lowlands), 90°C (highlands, "cool zones").
Geology:
Extreme Volcanism: Massive lava seas, active supervolcanoes, and violent tectonic shifts due to tidal heating from Dianma.
Magma Rivers: Vast basaltic plains with molten rock flows, shaped by gravitational interactions.
Gravity-Stretched Terrain: Enormous fissures and towering mountains caused by tidal forces.
Localized "Cool Zones"Highland Plateaus: Due to elevation and wind-driven cooling, some mountainous regions maintain tolerable temperatures (~90°C), allowing for solidified lava plains and temporary sulfuric snowfalls.
Deep Caverns: Subsurface lava tubes and shadowed regions provide a habitable refuge from the planet’s intense heat, where temperatures are cool enough for complex chemical interactions.
Exotic Weather PatternsSulfuric Acid Rain: The atmosphere contains large quantities of sulfuric compounds, leading to corrosive rainfalls in the highlands.
Electrified Ash Storms: Intense volcanic eruptions generate massive ash clouds, triggering planet-wide lightning storms and static discharges.
Cyclonic Firestorms: Superheated atmospheric currents form fire tornadoes, moving across the lava plains, fueled by volatile gases.
Occasional Atmospheric Cooling Events: When Dianma eclipses Perkuna, temporary drops in temperature allow for brief condensations of liquid sulfur lakes before they evaporate.