Looking at papers several years after their publication, about one-third of all astronomy papers have no citations, while only 2% of papers based on Hubble data have no citations.. 
Most ao systems Sharpen the View over a very narrow Field—lucky cam, for example, Ìpàdéd “p Images just 10" To 20" wide, whereas Hubble's Cameras are super sharp across a 2 /2km' (150") Field.. 