NASA Reference and Library Materials Menu (listed alphabetically) Exploring the Moon Slide Set (PDF file - 2 MB) Our Very Own Star: The Sun (PDF), a book for grades K-4. Also, the Spanish version - Nuestra Propia Estrella: el Sol (PDF) is available. Welcome to the Planets The WWW portion of NASA's Planetary Data System Educational CD-ROM online. This section contains a more in-depth description of each planet with many pictures of each. Imagine the Universe DVD - 13th Edition - March 2009: A NASA produced DVD that contains four astronomy education web sites captured in January 2009. It provides information, beautiful images, and learning adventures for all ages and grade levels. Included are... Starchild - general astronomy for grades K-8 Imagine the Universe! - exotic objects and topics in our universe for grades 7 and up. Astronomy Picture of the Day - beautiful images and explanations for all ages. Cosmic Times - a historical retrospective showing how astronomy changes on human timescales. (Prepared and produced by members of the Astrophysics Science Division at NASA's Goddard Space Flight Center to bring the excitement of their work to teachers, students, and the world.) Last modified by Nathan Smith - 20 April 2009