|Stamp Title:||Ancient Astronomical Instruments|
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|Date of Issue:||2012-06-11|
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|The postal authorities of Denmark and China jointly issued a set of stamps commemorating famous astronomers from both countries. |
The series of two stamps, called Ancient Astronomical Instruments, feature the Abridged Armilla of the 13th century Chinese astronomer Guo Shoujing, and the armillary sphere of his 16th century Danish counterpart Tycho Brahe.
According to Post Denmark, it was the first time the two countries' postal authorities collaborated on design and issue of such philatelic products.