Last October, back in the days where we could meet physically in actual auditoriums, I gave two talks about the history of astronomy, practical mathematics, observers and voyages of scientific exploration. They are both now available to view online.
Expeditionary Astronomers: the 1769 Transit of Venus and British Voyages of Scientific Exploration, at the Royal Astronomical Society on 11 October 2019 (30 minutes).
Mathematical Practice and 18th-Century British Voyages of Scientific Exploration, at the Museum of London for the annual Gresham College Lecture of the British Society for the History of Mathematics on 23 October 2019 (45 minutes).
teleskopos 