International Year of Astronomy
The inner part of the coin depicts an allegory of the birth of the stars and planets together with several astronomical instruments.
The mint mark ‘R’ is situated in the bottom left quadrant and the year ‘2009’ is at the bottom.
The design is surrounded on the bottom left-hand side by the legend ‘ANNO INTERNAZIONALE DELL’ASTRONOMIA’ and on the top right-hand side by the name of the issuing country, ‘CITTÀ DEL VATICANO’.
The coin’s outer ring depicts the 12 stars of the European flag