Галактички координатни систем — разлика између измена

* {{Cite book | ref= harv|editor= Hannu Karttunen, Pekka Kröger, Heikki Oja, Markku Poutanen, Karl Johan Donner |title= Fundamental Astronomy | edition = 5^th | publisher= Springer |location= Berlin|language= en|year= 2007 |isbn=978-3-540-34143-7 |pages=21 }}

* {{Cite book | ref= harv|title=Philip's Astronomy Encyclopedia | publisher=Philip's | year=2002 | pages=150 |id=ISBN 0–540–07863–8 | editor=Patrick Moore}}