We come now to the most extraordinary telescope in history. It was clumsy and awkward to use; it had only a limited view of the sky; it was never suited to a mechanical drive, and it could never be used for serious photography or spectroscopy. Yet it was by far the most powerful telescope ever built up to that time, and it was used to make fundamental discoveries. Its immense light-grasp meant that it could show objects quite beyond the range of any other existing instrument.
Unable to display preview. Download preview PDF.