WATCH KNOW LEARN - A great source of educational videos organized by age appropriateness, standard, and content area. You'll find rated, teacher-contributed material including over videos for whatever you need to teach!
Galaxies on a Map. The most complete map of our little corner of the universe to date. It took more that ten years to create, has galaxies and extends out 380 million light years from the earth. The coordinates of each galaxy was recorded