Editing Galactic coordinate system (section)

==References==
{{reflist|20em|refs=
<ref name="Blaauwetal">{{cite journal |title=The new IAU system of galactic coordinates (1958 revision) |first1=A. |last1=Blaauw
|last2=Gum |first2=C.S. |last3=Pawsey |first3=J.L. |last4=Westerhout |first4=G. |date=1960 |journal=[[Monthly Notices of the Royal Astronomical Society]] |volume=121 |number=2 |page=123 |bibcode = 1960MNRAS.121..123B |doi=10.1093/mnras/121.2.123|doi-access=free }}</ref>
<ref name="Reidetal">{{cite journal | last1=Reid | first1=M.J. | last2=Brunthaler | first2=A. | title=The Proper Motion of Sagittarius A* | journal=The Astrophysical Journal | volume=616 | issue=2 | pages=874, 883 | date=2004 | bibcode=2004ApJ...616..872R|arxiv = astro-ph/0408107 |doi = 10.1086/424960 | s2cid=16568545 }}</ref> 
<ref name="Binney">{{cite book |title=Galactic Astronomy |author=James Binney, Michael Merrifield |url=https://books.google.com/books?id=arYYRoYjKacC&q=rotation+%22proper+motion%22+galaxy+OR+galactic&pg=PA675 |pages= 30–31 |isbn=0-691-02565-7 |date=1998 |publisher=[[Princeton University Press]]}}</ref>
<ref name="Johnson">{{cite journal |title=Calculating galactic space velocities and their uncertainties, with an application to the Ursa Major group |last1=Johnson |first1=Dean R.H. |last2=Soderblom |first2=David R. |date=1987 |journal=Astronomical Journal |volume=93 |page=864|bibcode = 1987AJ.....93..864J |doi = 10.1086/114370}}</ref>
<ref name="SEDS">{{cite web | url=http://messier.seds.org/more/mw_con.html | title=SEDS Milky Way Constellations}}</ref>
}}