The Venus transit of 2012
Scientific collaboration in the 21st century
In 2004, a campaign of coordinated measurements was established, delivering impressive images that have been studied and recently published scientific paper (P. Tanga et al., Icarus 218, 2012, 207-219).
For 2012, Thomas Widemann of the Observatory of Paris / Meudon (Paris, France) and Paolo Tanga of the Observatory of the Côte d'Azur (Nice, France) developed a coronagraph especially to observe the transit of Venus:
The instrument has been tested and nine copies were built. These copies will be divided amongst teams all over the Earth. This network of instruments for observing the transit forms the Venus Twilight Experiment (Venus TEx).
As T. Widemann explains, two phenomena in particular can be studied during the transit of Venus: