A free-standing science center, located on the campus of The Johns Hopkins University and operated by the Association of Universities for Research in Astronomy (AURA) for NASA.

Operates the science program for the Hubble Space Telescope and will conduct the science and mission operations for the James Webb Space Telescope and supports other astronomy programs and conducts world-class scientific research.

STScI creates HST and JWST news, outreach, and education programs.

Total staff ~ 600: scientists, post-docs, engineers, administrators.