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
Tahiti seemed little concerned with the affairs of the kingdom, and when in 1880 the governor Henri Isidore Chessé, supported by the Tahitian chiefs, pushed him to abdicate in favour of France, he accepted. On 29 June 1880, he ceded Tahiti to France along with the islands that were its dependencies. He was given the titular position of Officer of the Orders of the Legion of Honour and Agricultural Merit of France. Having become a colony, Tahiti thus lost all sovereignty. Tahiti was nevertheless a special colony, since all the subjects of the Kingdom of Pōmare would be given French citizenship.