William Parsons

Earl of Rosse

Born: 1800, York, England Died: 1867, Dublin

Rosse, like Lassell, was principally a maker of telescopes and his contributions were mainly concerned with technological advance. He invented the lightweight mirror blank and successfully applied the "whiffle-tree" support principle of Thomas Grubb to his biggest telescope. (Courtesy Royal Astronomical Society, through Peter Hingley)

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