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Designed in Ireland, assembled in Australia, pointed at the stars In the 1860s the Dublin engineer Thomas Grubb built the world’s most advanced telescope about 3 hours ago Dr J Patrick Greene Great Melbourne Telescope: the instrument being installed in 1869, after it was shipped in pieces from the works of Thomas Grubb, in Dublin. Photograph: Museums Victoria   On July 3rd, 1866, a dramatic event took place in the Dublin suburb of Rathmines, not far from the Grand Canal, in a workshop specially built for the creation of a giant telescope. The effectiveness of the telescope depended on the quality of the mirror, and it was this that was being cast, watched by a group of fascinated gentlemen. Two tons of speculum, an alloy of copper and tin, was melted in a furnace and then poured into a hoop-ring mould. The casting took three weeks to cool, after which the

Mount stromloNew south walesGrand canalUnited kingdomRoyal botanic gardensBotanic gardensAustralian capital territoryThomas grubbEnoch lauHoward grubbQueen college in belfastUniversity of melbourneCo offalyBritish association for the advancement of scienceGreat melbourne telescopeMelbourne telescope