The Cocoon Nebula (IC 5146) in the constellation Cygnus (above) has an apparent extension of about 10 arc minutes. This is one third of the diameter of the full moon. It is about 3000 light-years away from Earth, so its...
After the drive units of the large dome were overhauled, we had to seal some joints and ducts. Since these cannot be reached by ladders from the outside, we used a lifting platform and also cleaned the dome from pollen...
Eleven years ago, the STScI, together with professional astronomers, was the main organizer of a long-term observation campaign at the Teide Observatory on Tenerife. At that time we investigated the behaviour of a...
This week a group from the HBW-house “Haus am Konradsberg” in Wiehl visited our observatory. After an introduction to the possibilities of the school lab, Klaus Vollmann made a special impression with the...
