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 and connected by a short isthmus named after the small town of Taravao which is situated there. The northwestern portion is known as "Tahiti Nui" ("big Tahiti"), while the much smaller southeastern portion is known as "Tahiti Iti" ("small Tahiti") or "Tai'arapū". "Tahiti Nui" is heavily populated along the coast, especially around the capital, Papeete. The interior of "Tahiti Nui" is almost entirely uninhabited. "Tahiti Iti" has remained isolated, as its southeastern half ("Te Pari") is accessible only to those travelling by boat or on foot. The rest of the island is encircled by a main road which cuts between