As its name implies, the 120 - foot long horn antenna was used to gather data that could be used to compare with observations made by the big dish telescopes. (public.nrao.edu)
Most attempts to measure are based on observations made in controlled situations. (teachermagazine.com.au)
Ever wondered what - and who - lies behind the beautiful and fascinating astronomical photographs and observations made with modern telescopes? (scienceinschool.org)