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« Astronomiae Instauratae Mechanica » - GLOBUS MAGNUS  i
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i  « ... The stellar globes are similar to a map of the world: a representation of the whole ... the celestial vault is observed "from the outside" and not from the Earth’s centre, the globe’s centre ... in Tycho’s mind, however, this instrument is much more ... its inner structure is of wood, seasoned for two years, after undergoing an accurate restoration, required after being abandoned for five years ... the surface of the instrument is then brass laminated, in such a perfect way, nobody can even suspect the inner structure is of wood ...  "  i   " ... The Equator and the Ecliptic were engraved onto the brass surface, "exactly dividing each degree of the two circles in sixty minutes, using traditional transversal graduation notches" ... with the contemporary use of mobile circles, graduated in a similar way, coherently oriented towards Uraniburg’s local horizon, the instrument allowed to transform the co-ordinates from celestial [AR and Dec] to local [Height and Azimuth] ...   i  The instrument may be called: a "mechanic analogical calculator" capable to transform co-ordinates ... its precision was guaranteed by the stability of the globe and by its conspicuous dimensions... diameter was about 1,8 m. ...  »  i
«… The large graduated horizontal ring is the local Uraniburg’s horizon. It surrounds the globe ...  i  The front vertical ring is the Meridian. It represents the circle that intersects the Zenith, the North and South Pole ...  i  The stellar globe revolved about the North-South axis, it is indicated in the picture with the letters IK ...  i  A graduated mobile vertical arc passing through the Zenith and the Nadir allowed to measure the altitude of the stars with respect to the local horizon ...  i  The pedestal positioned the local horizon at about one meter and a half from the floor ...  i  To use Tycho’s words: "A globe of such dimension, built in such a solid and fine way, precise in all aspects, was never built before... in any part of the world, this is my belief. (Forgive me, for praising myself.)"... Tycho represented on it the thousand and more stars he was able to measure … a work that lasted for a quarter of a centuryo ... »  i
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