NASA just released new images of Ceres taken from the Dawn spacecraft. This picture showed a second brighter spot which is brighter than the first. They lie adjacent to each other the same basin.
These pictures are just appetizers for the other pictures which Dawn will be sending back to Earth soon. The spacecraft will be entering the orbit of Ceres on March 6. With clearer picture, the mystery will soon be solved. Some scientists’ believed that the bright spots are none but ice formation.