Hale telescope
Blanco was employed by the University of Puerto Rico as an assistant professor of astrometry, until he was recruited in 1948 to assist in polishing, calibrating and maintaining the mirrors of the 200-inch Hale telescope in California. He entered the University of California, Berkeley, where he continued his studies and earned his master's degree and, in 1949, his Doctorate in astronomy. In 1949, he returned to Puerto Rico and reassumed his duties at the University of Puerto Rico.