He was elected a member of the International Astronomical Union in 1966; having twice edited the Union's General Assembly newsletters. He attempted to establish an International Union of Amateur Astronomers, which failed due to lack of interest. During the 1970s and 80s, he reported on the Voyager and Pioneer programs, often from NASA headquarters. At this time he became increasingly annoyed by conspiracy theorists and reporters who asked him questions such as "Why waste money on space research when there is so much to be done here?". He said that when asked these type of questions "I know that I'm dealing with an idiot." Another question that annoyed him was "what is the difference between astronomy and astrology?" Despite this he made a point of responding to all letters delivered to his house, and sent a variety of standard replies to letters asking basic questions, as well as those from conspiracy theorists, proponents of hunting and 'cranks'. Despite his fame, his telephone number was always listed in the telephone directory and he was happy to show members of the public his observatory.