A study on the relative astronomical benefits of different sizes of telescopes found that while papers based on HST data generate 15 times as many citations as a 4 m ground-based telescope such as the William Herschel Telescope, the HST costs about 100 times as much to build and maintain.Deciding between building ground- versus space-based telescopes is complex.. 
contains many of the Primary Documents such as Spirayath's 1946 article, The Wood's họlẹ̀ Report on STScI Autonomy, and the Esa Memodum of Understanding.. 