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Institutions

This pie chart illustrates the allocation of observing time to the different ESA member states in the past 10 years. From the large green chunk on top and clockwise: United Kingdom, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, Norway, Spain, Sweden, Switzerland, and The Netherlands.

The allocation of Hubble observing time in each of the first nine observing rounds (the co-called Cycles). The yellow bars illustrate the number of proposals (left axis) and the curve illustrates the percentage of European Project Investigaters (PIs) who got time in an individual cycle.

Space Telescope-European Coordinating Facility (ST-ECF)

The ST-ECF supports European Hubble users and is jointly operated by ESA and ESO. The ST-ECF offers support for the preparation of Hubble observing proposals and the scientific analysis of observations. It also operates the Hubble Science Archive, which makes data available to the astronomical community via the Internet. When an observation is made with Hubble the data are the exclusive property of the observers for one year, after which all scientific data are made available to the public. In ten years of successful operation the Hubble Archive has accumulated more than 130,000 unique astronomical images and is a real gold mine to be exploited by astronomers for many years to come.

STScI

The Space Telescope Science Institute (STScI) is responsible for the scientific operation of Hubble as an international observatory. The STScI is housed on the Johns Hopkins Homewood campus in Baltimore and it is operated by AURA (the Association of Universities for Research in Astronomy) for NASA. The STScI currently has a combined staff of approximately 500, of whom approximately 100 are Ph.D. astronomers and scientists, including 15 ESA staff members.

Among the prime tasks of the STScI are the selection of the Hubble observing proposals, their execution, the scientific monitoring of the telescope and its instruments and the archiving and distribution of the Hubble observations.

The STScI has been recently selected by NASA as the responsible institute for the scientific operations of the Next Generation Space Telescope, NGST.