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Terrestrial Planet Finder
NASA concept study of an array of space telescopes / From Wikipedia, the free encyclopedia
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The Terrestrial Planet Finder (TPF) was a proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets. TPF was postponed several times and finally cancelled in 2011.[1][2] There were two telescope systems under consideration, the TPF-I, which had several small telescopes, and TPF-C, which used one large telescope.
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