GAIA: Composition, formation and evolution of the Galaxy

  title={GAIA: Composition, formation and evolution of the Galaxy},
  author={Michael A. C. Perryman and Klaas S. de Boer and Gerry Gilmore and Erik H{\o}g and Mario Gilberto Lattanzi and Lennart Lindegren and Xavier Luri and François Mignard and Oscar Pace and P. T. de Zeeuw},
  journal={Astronomy and Astrophysics},
The GAIA astrometric mission has recently been approved as one of thenext two ``cornerstones'' of ESA's science programme, with a launch datetarget of not later than mid-2012. GAIA will provide positional andradial velocity measurements with the accuracies needed to produce astereoscopic and kinematic census of about one billion stars throughoutour Galaxy (and into the Local Group), amounting to about 1 percent ofthe Galactic stellar population. GAIA's main scientific goal is toclarify the… 

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