
Other worlds
K2-141b: where it rains rock.
A lava world roughly 200 light-years away, locked with one face to its star forever. It runs the same cycle as Earth — with molten rock doing the job water does here.
A cycle made of stone
Tidal locking is what makes this possible: a permanent dayside to evaporate from, and a permanent nightside to condense on.
Evaporation
The dayside is an ocean of molten rock, roughly 100 km deep, hot enough that the rock itself vaporises — silicates rising as vapour rather than water.
Condensation
Supersonic winds carry that vapour to the nightside, which never sees the star and is bitterly cold. The vapour condenses there.
Precipitation
It falls as stone. Not metaphorically — solid rock precipitating out of an atmosphere, the way snow falls here.
Collection
The fallen rock flows back toward the dayside as lava and melts again. Evaporation, condensation, precipitation, collection — the same four steps, with silicates instead of water.
What that means for the game
The most extreme world in the game, and the one that makes the point hardest.
The cycle is not about water
A world where rock does what water does here is the clearest possible demonstration that the water cycle is a description of how a substance moves through phases, not a fact about water.
Extreme heat
Where Titan is extreme cold, K2-141b is extreme heat — the two ends of the same idea. Its drops, palette and haze all belong to a molten world.
No trivia of its own
The game hides the trivia button in this world rather than asking Earth's water questions in a place with no water. A deliberate gap, not an oversight.
Where this comes from
An exoplanet nobody has photographed is exactly the kind of claim that needs its sources attached.