Ceres’s salty cryovolcano: Ahuna Mons rises from a frozen brine

NASA’s Dawn data mark Ahuna Mons on the dwarf planet Ceres as a four-kilometer-tall cryovolcanic dome built from a viscous brine–ice–salt slurry that surfaced and froze, with gravity evidence pointing to a buried source. Its youthful, steep profile and bright mineral streaks suggest recent internal activity within tens to hundreds of millions of years, making it a standout, possibly episodic example of icy volcanism on Ceres.