The Archbishops of Armagh filmed their Christmas message at Armagh Observatory and Planetarium.The message will be broadcast on Christmas Day at 12.10pm on RTÉ One television and 1.05pm on RTÉ Radio One.The programme will feature carol singing by a choir from Armstrong Primary School and St Patrick’s Primary School.Armagh Observatory, founded in 1790, is one of Ireland’s leading centres for astronomical research and education.