Thanks to ESA's Venus Express, scientists have been revealing new and crucial details about our closest planetary neighbour.

A coordinated ground-based observation campaign will now contribute to the growing body of information on the nature of Venus’s atmosphere and will help put the spacecraft’s observations in a broader context.

Between 23 May and 9 June, tens of scientists, working at a dozen telescopes and observatories spread all over the world, will examine Venus from the ground and perform measurements, some of which are not feasible for Venus Express.