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Canada

Canada celebrated the International Year of Astronomy by issuing a 30 dollars silver coin.

The obverse shows a spiral galaxy, a comet on a blue colored central background. Around it four planets, Jupiter and Saturn are easily identifiable. On lower right an observatory is depicted. Legend above is: "CANADA".

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The reverse shows the right facing portrait of Queen Elizabeth II, also her name and title is mentioned in the legend, along with the face value and date 2009.

Technical specifications
Mintage Limited to 10000 coins worldwide
Composition 92.5% silver, 7.5% copper
Finish proof (with color on the obverse)
Weight 33.75 gram
Diameter 40 mm
Edge serrated
Certificate serialized
Face value $30
Artist Colin Mayne (obverse), Susanna Blunt (reverse)