International Partners

The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA's Goddard Space Flight Center in Greenbelt, MD., manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, MD., conducts Hubble science operations. STScI is operated for NASA by the Association of Universities for Research in Astronomy, Inc., in Washington, DC.

As lead agency, NASA has overall responsibility for the Hubble Space Telescope. ESA’s contributions to HST include among other things, the Faint Object Camera, the first two solar wings that powered the spacecraft and a team of space scientists and engineers at the Space Telescope Science Institute (STScI) in Baltimore, MD. Europe's contribution to HST entitles European astronomers to 15% of the telescope's observing time.