The indistinct contact of Venus with the solar edge complicated the measurements made at this transit.
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Publication supplied tools for calculating motions of planets and comets, though later work refined them.
Venus transits the Sun 6 June 1761
NASA's UTC catalog dates the transit to 6 June; some observers described it as 5 June in their local time.
International observers time Venus 6 June 1761
Teams at widely separated sites recorded the transit to help estimate the Earth–Sun distance.
Contact timings test a solar-system scale 6 June 1761
Astronomers sought to compare the instants when Venus crossed the solar limb across different locations.
👉 The black-drop effect limits timing precision Current 6 June 1761
The indistinct contact of Venus with the solar edge complicated the measurements made at this transit.
Venus crosses the Sun above Tahiti 3 June 1769
Cook and Green recorded the transit from Tahiti during an international observing campaign.
Tahiti becomes a transit observing site 3 June 1769
European expedition members observed from an island with its own navigational and celestial knowledge traditions.
Transit drawings capture contact uncertainties 3 June 1769
Cook and Green's drawings helped document the event and the difficulty of timing its edge.
A Pacific observation helps measure distance 3 June 1769
Observations from Tahiti were compared with observations elsewhere to estimate the scale of the solar system.
Herschel spots the object later named Uranus 13 March 1781
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