Flat-Screenfoil
The new flatscreen of Gerd Neumann contains a illumination flatfieldfoil (high voltage/low current) embedded in a plastic frame sandwich.
How to fix this flatscreen box in front of the cassegrain? A special base plate, with a size just smaller of the diameter of the primary focuser, was build and combined with an old 2 zoll adpater. This locking adapter was glued on the center of the transparent screen in order to allow the fixation of the flatbox into the primary focuser in front of the cassegrain.
The illuminated assemply just fits, with a foildiameter of (42x42)cm, in front of the cassegrain and the 42cm mirror. The flat frames can be exposed in every position of the cassegrain, even in the closed observatory in preparation of the night session.
The full field is equally illuminated.
The Cassegrain Flat
The flat of the Cassegrain/ST10XME/36mm filter/secondary corrector...
Io verschwindet im Schatten von Jupiter. Während der ganzen Nacht ideale Bedingungen für die Deep-Sky-Beobachtung. Mehrere Überflüge der Internationalen Raumstation ISS am Abendhimmel. 
Ferngläser, auch Feldstecher genannt, sind exzellente und universell einsetzbare Beobachtungsgeräte. Sie sind im Vergleich zu einem Teleskop klein, kompakt und lichtstark. 
As Vega?s development is coming to an end with the qualification flight scheduled in 2011, two contracts were signed to allow the project to move on to the next phase. 
ESA?s GOCE gravity mission has recovered from a glitch that prevented the satellite from sending its flow of scientific data to the ground. News of the recovery comes earlier than expected, thanks to the fervent efforts of a team of experts.