His knowledge of astronomical instruments was legendary, especially of optical and electronic devices and of image converters. He died unexpectedly on 13 March 1984 during a business trip to the Calar Alto Observatory in Almería, Spain.
The astronomer was renowned for his knowledge of various types of astronomical instruments, including optical and electronic devices as well as image converters. He died unexpectedly on March 13, 1984, during a business trip to the Calar Alto Observatory in Almería, Spain.