for its involvement we received requests especially on the follow up missions because we've been there and provided material that really lasts that long. no mistakes can be allowed to happen during production and processing the light must be able to spread equally well throughout the glass this is checked here with a microscope. in space the court's glass is exposed to extreme radiation as well as temperature fluctuations of several 100 degrees it has to work reliably repairs are not possible. that's why so many performed in the space program they give us manufacturers as much information about the material. situations that were previously impossible to test at our factory. the 1st robot to land on a comet had quartz glass from the german company. the european