“I expected to be surprised because we knew so little about Ceres,” Christopher Russell, Dawn’s principal investigator and a planetary scientist at UCLA, said in an email. “I never expected bright spots and a pyramid to be the surprises.”

http://www.latimes.com/science/sciencenow/la-sci-sn-ceres-pyramid-bright-spots-dawn-nasa-dwarf-planet-20150626-story.html