Talk:Fluid World

Most non-water fluids require significantly lower temperatures than the habitable zone offers, mainly because these molecules lack strong hydrogen bonds. The Saturn moon Titan has liquid methane, with small amounts of longer aliphatic hydrocarbons. Bodies covered in liquids of longer aliphatic or simple aromatic hydrocarbons are a lot less likely to form naturally, and are bound to dissociate or polymerize under influence of energetic radiation.

NH3 has a liquid range between 196 and 240 Kelvin under normal pressure. Dissolved higher boiling point molecules or ions might raise the boiling point somewhat. As a polar solvent, a chemistry similar to water based chemistry might allow biochemistry to happen.

Sulphuric acid has a rather broad liquid range. If Venus was moved to the far side of the habitable zone, it might be covered with liquid acid.

Molten salt, rock or metal might be found on quite hot bodies. These could be planetoids in an aggregation disk, independent of distance from the primary while slowly radiating off the impact heat. Or rock planets or moons hit by a rogue body.