https://phys.org/news/2018-11-life-esa-science-missions.html

The decision was taken during the SPC meeting at ESA's European Space Astronomy Centre near Madrid, Spain, on 14 November.

ESA's science missions have unique capabilities and are prolific in their scientific output. Cluster, for example, is the only mission that, by varying the separation between its four spacecraft, allows multipoint measurements of the magnetosphere in different regions and at different scales, while Gaia is performing the most precise astrometric survey ever realised, enabling unprecedented studies of the distribution and motions of stars in the Milky Way and beyond.