Neuer ATM Letter: Ausgabe März/ April

Inhalt:

- Visible ans Infrared Survey Telescope for Atronomy
- Biocolar Terms
- Amateur Telscope Optics Part II
- Unobstructed_Design.xls: Carl´s Yolo and
Schiefsspiegler Spredsheet
- Optical Computing: Sky Atlas- Freeware planertarium
for Windows uncludes C++ source code
- Histroy: John Brashear- American Astronomer and
Telscope Maker

Link zu ATM Letters