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Katherine Johnson: Hidden Figures Nasa mathematician dies at 101
Ms Johnson, who helped launch the first American into orbit, was portrayed in the film Hidden Figures.
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Follow up video can be found here.
Telescopes
Invited to design a mounting for the Isaac Newton (optical) telescope, Wallis produced a design for the whole telescope and the building to put it in, but his design was not taken up. His ideas later fed into a design for a large radio telescope, which was adopted for the Parkes Telescope in New South Wales, Australia. Completed in 1961, it included a dish with a geodetic structure and a mounting of novel Wallis design, both of which are still in use today. The telescope’s “finest hour” was receiving part of the first TV broadcast from the Moon.