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ESRO-2B or Iris (International Radiation Investigation Satellite) was a European astrophysical spin-stabilised research satellite which was launched in 1968. Operated by the European Space Research Organisation, ESRO 2B made astronomical surveys primarily in x-ray and solar particles detectors.
The inner part of the piece represents the ESRO 2B satellite placed into Earth orbit.
A geographical map of Western Europe spans the outer ring and inner core on the right side of the coin. The inscription 2 EURO is superimposed over the map of Europe, with the numeral “2” located in an open field representing the eastern Atlantic Ocean.
The sequence "2 ★ ★" repeated six times alternately upright and inverted.
2 ★ ★ 2 ★ ★ 2 ★ ★ 2 ★ ★ 2 ★ ★ 2 ★ ★