© National Maritime Museum, Greenwich, London
© National Maritime Museum, Greenwich, London
Finding longitude was not all about clocks. Captain Cook made successful use of astronomical tables and accurate observations. He also used Harrison's watches on later voyages.
Credit: NASA
Today's explorers are also scientists. This is another captain, Samantha Cristoforetti, a Captain in the Italian Air Force, running experiments on board the International Space Station in April 2015.