1769 Transit of Venus observed from Tahiti while voyaging to (unsuccessfully) observe the 1761 Transit in Sumatra. Using the solar parallax values obtained from the 1769 transit, Hornsby wrote in "Philosophical Transitions" December 1771 that "the mean distance from the Earth to the Sun (is) 93,726,900 English miles." The radar-based value used today for the astronomical unit is . This is only a difference of eight-tenths of one percent. Considering what these astronomers had to work with, their results were "absolutely remarkable". 1769 Transit of Venus observed from Tahiti On June 3, 1769, British navigator Captain James Cook, British naturalist Joseph Banks, British astronomer Charles Green and
James Wilson (explorer) directors of the Society appointed a committee to consider a suitable memorial for presentation to Wilson for his services in helping to establish the first mission in the South Seas. He published an account of his voyage: "A Missionary Voyage to the Southern Pacific Ocean" in 1799. James Wilson (explorer) Captain James Wilson (1760–1814), commanded the British ship "Duff", which the London Missionary Society contracted in 1797 to convey a team of missionaries (consisting of thirty men, six women, and three children) to their postings in Tahiti, Tonga, and the Marquesas Islands. During the voyage, Wilson also surveyed (or confirmed