David Aguilar is a notable astronomer and the author and illustrator of several National Geographic books on astronomy, including the 2008 Voice of Youth Award winner, Planets, Stars and Galaxies: A Visual Encyclopedia of Our Universe, and the 2011 Eureka Gold Award best science book winner, 13 Planets. His upcoming book, Alien Worlds, investigates just how bizarre alien life might be.  Aguilar is the popular host of the Harvard-Smithsonian Center for the Astrophysics “Observatory Nights” program, and he leads travelers to destinations around the globe to explore celestial phenomena. He and his wife reside near Cambridge, MA, and at their observatory outside Aspen, CO.