The largest and most famous of Herschel's telescopes was a reflecting telescope with a 49-inch-diameter (1.26 m) primary mirror and a focal length. The 40-foot telescope was, at that time, the largest scientific instrument that had been built. It was hailed as a triumph of "human perseverance and zeal for the sublimest science".
The largest and most famous of Herschel's telescopes was a reflecting telescope with a 49-inch-diameter (1.26 m) primary mirror and a focal length. The 40-foot telescope was, at that time, the largest scientific instrument that had been built It was hailed as a triumph of "human perseverance and zeal for the sublimest science".