Reflectivity studies from September 2015 suggest that the spots are probably salts rather than ice, implying that Ceres's interior is somehow delivering fresh salt to the surface.
2015年9月對反照率的研究表明斑點可能是鹽而不是冰，這意味著在某種程度上，穀神星的內部會像表面提供新鮮的鹽。