Obručasta sfera – razlika između verzija

==Istorija==

[[Datoteka:Clock Tower from Su Song's Book.JPG|thumb|right|200px|Originalni dijagram iz [[Su Song]]ove knjige ([[1092]].), koja pokazuje mehanizam njegove [[sahat kula|sahat kule]], na čijem vrhu se nalazi obručasta sfera, s mehaničkim pogonom]]

 

{{U začetku}}

{{reflist}}

 

(na engleskom:)

* {{1911|article=Armilla|author=[[Margaret Lindsay Huggins]]}}

* Williams, Henry Smith (2004). ''A History Of Science''. Whitefish, MT: Kessinger Publishing. ISBN 1419101633.

 

{{Commons|Armillary sphere}}

(na engleskom:)

* [http://www.astromedia.de AstroMedia* Verlag in Germany offers a cardboard construction kit for an armillary sphere ("Das Kleine Tischplanetarium")]

* [http://www.hyloc.co.uk/hyloc/Armillary_spheres.html Two steal and brass Armillary Spheres made in Worcester]

 

{{Grčka astronomija}}