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 while Mau'a would sail with Lt. Gayangos on "Aguila". Portuguese navigator Pedro Fernandes de Queirós, serving the Spanish Crown in an expedition to Terra Australis, was perhaps the first European to set eyes on the island of Tahiti. He sighted an inhabited island on 10 February 1606 which he called Sagitaria (or Sagittaria). However, whether the island that he saw was actually Tahiti or not has not been fully ascertained. It has been suggested that he actually saw the island of Rekareka to the south-east of Tahiti. According to other authors the first European to arrive in Tahiti was Spanish