Full_and_Proper_Kit
Concentrating Sunlight With an Immobile Primary Mirror and Immobile Receiver Ray-Tracing Results
Optical Imaging in Astronomy 1st CASSDA School for Observers Observatorio del Teide, 20 – 25 April 2015 Franz Kneer Institut für Astrophysik Göttingen.
Some general notes astronomynotes/nakedeye/s6.htm
