This striking Greek commemorative stamp was issued in 1966 to mark the Astronautical Congress held in Athens. The design features bold planetary symbols—Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto—arranged artistically in gold and orange against a deep blue background. The top inscription in Greek reads “Αστροναυτικόν Συνέδριον – Αθήναι” (Astronautical Congress – Athens), celebrating Greece’s role in advancing international cooperation in space science.

A beautiful example of mid-20th-century space-themed philately, it reflects the fascination with astronomy and astronautics during the height of the Space Age.