How much information is contained in the data archives at STScI?

The Barbara A. Mikulski Archive for Space Telescopes (MAST) consists of data taken in ultraviolet and visible light by NASA space-borne missions, such as the Hubble Space Telescope and the International Ultraviolet Explorer. The information from a variety of wavelength regions offers a complete spectrum or picture of a star or galaxy. Such comprehensive information helps to eliminate false impressions about the object from data covering only a few wavelength regions.

The archives contain spectra of about 600,000 astronomical objects taken by Hubble. The archives also hold thousands of spectra taken by other satellites, such as the Galaxy Evolution Explorer and the Far Ultraviolet Spectroscopic Explorer. In 2005, MAST contained around 25,000 gigabytes of data.

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