Proposals for amateur time were stringently reviewed by a committee of amateur astronomers, and time was awarded only to proposals that were deemed to have genuine scientific merit, did not duplicate proposals made by professionals, and required the unique capabilities of the space telescope.
Propunerile pentru timpul folosit de amatori erau analizate foarte exigent de o comisie de astronomi amatori, iar timpul era acordat doar propunerilor cu real merit științific, care nu dublau propuneri efectuate de profesioniști și care necesitau posibilitățile unice ale telescopului spațial.