Netherlands 1928 – Christiaan Huygens 

Christiaan Huygens (1629–95), a Dutch physicist and astronomer, was noted for his observations of the planets. He discovered Titan, Saturn’s largest moon; recognized that Saturn was surrounded by a flat ring system; and charted surface markings on Mars, notably the wedge-shaped Syrtis Major. Fittingly, the European Space Agency’s probe which landed on Titan in 2005 January was named Huygens. The wording ‘Voor Het Kind’ on the stamp, literally meaning ‘For the Child’, indicates that this is a Child Welfare issue. 

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