A wealth of information. Does not contain all research papers produced by NASA.
NASA’s new online archive is a treasure trove of free research articles
" ... NASA launched a free online archive for science journal articles that were funded by the space agency. The archive, which was announced this week, is called PubSpace, and it will make available research and data that are often hidden behind the subscriptions and paywalls of scientific journals. PubSpace will be managed by the National Institutes of Health as part of its own database called PubMed Central. ... " Service is here.