Passage de Vénus

Passage de Vénus is a series of photographs of the transit of the planet Venus across the Sun on 9 December 1874.

[1] They were purportedly taken in Japan by the French astronomer Jules Janssen and Brazilian engineer Francisco Antônio de Almeida using Janssen's 'photographic revolver'.

Numerous expeditions were planned and sent out to observe the transit from locations around the globe, with several countries setting up official committees to organise the planning.

Frenchman inventor Janssen came up with the idea for a "revolver photographic".

[9] The revolver could take several dozens of exposures at regulated intervals on a daguerreotype disc.

Animated version of a test plate for Passage de Vénus
The team that captured the transit of Venus in 1874