• constellation of the Zodiac in the northern hemisphere. Meaning the twins, Gemini is best known for the bright stars Castor and Pollux, representing the mythical twins.
  • US two-man spacecraft programme, carried out between 1961 and 1963
  • US/European project to build two 8.1m telescopes on Hawaii and at Cerro Pachon in Chile. Both telescopes came into operation in 2000.

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