Rujukan Sistem koordinat galaksi

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  2. 1 2 Reid, M.J.; Brunthaler, A. (2004). "The Proper Motion of Sagittarius A*". The Astrophysical Journal. The American Astronomical Society. 616 (2): 874, 883. arXiv:astro-ph/0408107. Bibcode:2004ApJ...616..872R. doi:10.1086/424960. Dicapai pada 2012-06-26.
  3. James Binney, Michael Merrifield (1998). Galactic Astronomy. Princeton University Press. m/s. 30–31. ISBN 0-691-02565-7.
  4. Johnson, Dean R.H.; Soderblom, David R. (1987). "Calculating galactic space velocities and their uncertainties, with an application to the Ursa Major group". Astronomical Journal. 93: 864. Bibcode:1987AJ.....93..864J. doi:10.1086/114370.
  5. "SEDS Milky Way Constellations".