David Aguilar, author of "Planets, Stars, and Galaxies," is the Director of Science Information at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. Previously, he was the Director of the Fiske Planetarium and Science Center at the University of Colorado. He is an accomplished astronomy illustrator and an experienced educator with an enormous enthusiasm for bringing science to children. David Aguilar lives in Boston, MA.