Sunday 2 April 2023

Mr Tetley of Leeds and his Cooke telescope

In October 1930 Mr Tetley of Headingley, Leeds used his 4 inch Thomas Cooke & Sons telescope to observe the Sun. He took some photographs of the great sun spot group of October that year. In particular on October 10th the photographs very clearly showed the changes which took place in the groups which crossed the central meridian

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