In 1965, he was appointed director of the newly constructed Armagh Planetarium in Northern Ireland, a post he held until 1968. His stay outside England was short partly because of the beginning of The Troubles, a dispute Moore wanted no involvement in. He was appointed Armagh County secretary of the Scout movement, but resigned after being informed that Catholics could not be admitted. In developing the Planetarium, Moore travelled to Japan to secure a Goto Mars projector. He helped with the redevelopment of the Birr Telescope in the Republic of Ireland. He was a key figure in the development of the Herschel Museum of Astronomy in Bath.