The Nature group has dedicated a special issue to the dwarf planet Ceres with a series of articles published in its journals. Various teams of researchers studied different aspects of the geology of Ceres with particular attention to the presence of water and hydrated sodium chloride, in very simple words table salt mixed with water. There are confirmations of the presence in the past of an underground ocean of which a strong presence of salts significantly lowered the freezing point. The salts present in the famous bright spots such as that in Occator Crater are among the remains of that ocean: they’re mainly sodium carbonate and ammonium chloride, but there’s also sodium chloride.