DOI :10.26650/PB/PS01.2021.001.002   IUP :10.26650/PB/PS01.2021.001.002    Full Text (PDF)

Gaia: Astrometric Survey of the Galaxy

Gerry Gilmore

Gaia provides 5-D phase space measurements, 3 spatial coordinates and two space motions in the plane of the sky, for a representative sample of the Milky Way’s stellar populations (over 2 billion stars, being ~1% of the stars over 50% of the radius). Full 6-D phase space data is delivered from line-of-sight (radial) velocities for the 300 million brightest stars. These data make substantial contributions to astrophysics and fundamental physics on scales from the Solar System to cosmology.


  • Casali, G., Magrini, L., Tognelli, E. et. al., 2019, A&A, 629A, 62 google scholar
  • Gilmore, G., Reid, I. N., 1983, MNRAS, 202, 1025 google scholar
  • Gilmore, G., Randich, S., Asplund, M. et al., 2012, The Messenger, 147, 25 google scholar
  • Gilmore, G., 2018a, Contemporary Physics, 59, 155 google scholar
  • Gilmore, G., 2018b, Astrometry and Astrophysics in the Gaia sky, Proceedings of the International Astronomical Union, IAU Symposium, 330, 23 google scholar
  • Masseron, T., Gilmore, G., 2015, MNRAS, 453, 1855 google scholar
  • Pieres, A., Girardi, L., Balbinot, E. et al., 2020, MNRAS, 497, 1547 google scholar
  • Perryman, M., de Boer, K., Gilmore, G. et al., 2001, A&A, 369, 339 google scholar
  • Sanders & Gilmore (in prep) google scholar


Istanbul University Press aims to contribute to the dissemination of ever growing scientific knowledge through publication of high quality scientific journals and books in accordance with the international publishing standards and ethics. Istanbul University Press follows an open access, non-commercial, scholarly publishing.