Please note: This text was taken directly from the manufacturer.
It's the first-ever star chart that folds up like a road map! DeepMap 600 shows the positions of the 600 finest celestial objects visible from the Northern Hemisphere. All are plotted on a giant 33" x 21" full-color star chart by world-renowned star-mapper Wil Tirion. DeepMap 600 is designed for easy location of hundreds of deep-sky objects with telescopes and binoculars. Color-coded symbols identify more than 500 galaxies, nebulas, and star clusters-including all 109 Messier objects-as well as some 100 of the most interesting double and variable stars. No other single star chart includes so many objects! What makes DeepMap 600 really indispensable is that it folds up "accordion style" to a thin, pocket-size 4-3/4" x 10-1/2-just like a road map! No longer must you fumble with bulky books, star atlases, and observing references to find interesting objects to view.
