The Great Voyages of Discovery card series was distributed in 1966 by Ty-Phoo Tea Ltd. in Birmingham, England. The illustrated 24-card collection showcases explorers and discoveries throughout history from Hanno the Navigator to the 1966 landing of Luna 9.

The series was issued in full-color or black-and-white variations. Each color card measures approximately 1.4 x 2.65 inches. The back of each card is blank. A Great Voyages of Discovery fold-out map was produced by Finding Out magazine.

Card #23 depicts a painting of Soviet cosmonaut Yuri Gagarin and Sputnik 1. On April 12, 1961, Gagarin became the first human to fly in space and orbit the Earth.