Schupmann Telescope CDs & DVDs You can have the whole

You can have the whole world in your hand with our new 6-inch (15-cm) Earth globe

26 sky charts showing the locations of the Arp galaxies by region (see sample)

and NGC 5728

maps provide maximum clarity and are optimized for use with red light—ideal for nighttime observation

Publication Date: December 2014

Schupmann Telescope CDs & DVDs You can have the wholeBy James Daley. Product Information: Hardbound, 6 by 9 inches, 200 pages. Perfecting the refracting telescope has frustrated lens designers and glass makers since the invention of the telescope. This is because when using standard crown and flint glasses, residual longitudinal color (its dominant defect) cannot be reduced to an optically harmless value. Even today, the most expensive special glass apochromats show some noticeable color, especially at