Transit of Venus in the context of "Astronomical transit"

A transit of Mercury across the Sun takes place when the planet Mercury passes directly between the Sun and a superior planet. During a transit, Mercury appears as a tiny black dot moving across the Sun as the planet obscures a small portion of the solar disk. Because of orbital alignments, transits viewed from Earth occur in May or November. The last four such transits occurred on May 7, 2003; November 8, 2006; May 9, 2016; and November 11, 2019. The next will occur on November 13, 2032. A typical transit lasts several hours. Mercury transits are much more frequent than transits of Venus, with about 13 or 14 per century, primarily because Mercury is closer to the Sun and orbits it more rapidly.

On June 3, 2014, the Mars rover Curiosity observed the planet Mercury transiting the Sun, marking the first time a planetary transit has been observed from a celestial body besides Earth.

HMS Endeavour was a Royal Navy research vessel that Lieutenant James Cook commanded to Tahiti, New Zealand and Australia on his first voyage of discovery from 1768 to 1771.

She was launched in 1764 as the collier Earl of Pembroke, with the Navy purchasing her in 1768 for a scientific mission to the Pacific Ocean and to explore the seas for the surmised Terra Australis Incognita or "unknown southern land". Commissioned as His Majesty's Bark Endeavour, she departed Plymouth in August 1768, rounded Cape Horn and reached Tahiti in time to observe the 1769 transit of Venus across the Sun. She then set sail into the largely uncharted ocean to the south, stopping at the islands of Huahine, Bora Bora, and Raiatea west of Tahiti to allow Cook to claim them for Great Britain. In September 1769, she anchored off New Zealand, becoming the first European vessel to reach the islands since Abel Tasman's Heemskerck 127 years earlier.

The first voyage of James Cook was a combined Royal Navy and Royal Society expedition to the south Pacific Ocean aboard HMS Endeavour, from 1768 to 1771. The aims were to observe the 1769 transit of Venus from Tahiti and to seek evidence of the postulated Terra Australis Incognita or "undiscovered southern land". It was the first of three voyages of which James Cook was the commander.

The voyage was commissioned by King George III and commanded by James Cook, promoted from master to lieutenant so that he could take command of Endeavour. Cook had good skills in cartography and mathematics. Departing from Plymouth Dockyard in August 1768, the expedition crossed the Atlantic, rounded Cape Horn and reached Tahiti in April 1769, before the expected transit on 3 June. After the observation, Cook stopped at the nearby islands of Huahine, Borabora and Raiatea to claim them for Great Britain before sailing into the largely uncharted ocean to the south and west. In October, the expedition reached New Zealand; Cook was only the second European to visit there, following the first voyage of Abel Tasman 127 years earlier. Cook and his crew spent the following six months charting the New Zealand coast, before resuming their voyage westward across open sea. In April 1770 they became the first known Europeans to reach the east coast of Australia, making landfall near present-day Point Hicks, and then proceeding north to Botany Bay.

Edmond (or Edmund) Halley FRS (/ˈhæli/; 8 November [O.S. 29 October] 1656 – 25 January 1742 [O.S. 14 January 1741]) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720.

From an observatory he constructed on Saint Helena in 1676–77, Halley catalogued the southern celestial hemisphere and recorded a transit of Mercury across the Sun. He realised that a similar transit of Venus could be used to determine the distances between Earth, Venus, and the Sun. Upon his return to England, he was made a fellow of the Royal Society, and with the help of King Charles II, was granted a master's degree from Oxford.

The following is a timeline of Solar System astronomy and science. It includes the advances in the knowledge of the Earth at planetary scale, as part of it.

On 3 June 1769, navigator Captain James Cook, naturalist Joseph Banks, astronomer Charles Green and naturalist Daniel Solander recorded the transit of Venus from the island of Tahiti during Cook's first voyage around the world. During a transit, Venus appears as a small black disc travelling across the Sun. Transits of Venus occur in a pattern that repeats itself every 243 years, with two transits that are eight years apart, separated by breaks of 121.5 and 105.5 years. These men, along with a crew of scientists, were commissioned by the Royal Society of London for the primary purpose of viewing the transit of Venus. Not only would their findings help expand scientific knowledge, it would help with navigation by accurately calculating the observer's longitude. At this time, longitude was difficult to determine and not always precise. A "secret" mission that followed the transit included the exploration of the South Pacific to find the legendary Terra Australis Incognita or "unknown land of the South".

Charles Green (baptised 26 December 1734 – 29 January 1771) was a British astronomer, noted for his assignment by the Royal Society in 1768 to the expedition sent to the Pacific Ocean in order to observe the transit of Venus aboard James Cook's Endeavour.