Thomas Widemann (Observatoire de Paris/LESIA UMR 8109) Venus exploration, from ground and space, after Venus Express Venus atmospheric science is increasingly important in an era in which we are trying to understand the divergent evolutionary outcomes for terrestrial exoplanets in their habitable zone. The case for Venus exploration is currently revisited in the legacy of the highly successful ESA Venus Express mission, launched on 2005 and due to end its routine science operations later this year (May 2014). Both NASA and European Space Agencies will release calls for Discovery-class and M-class missions this year. We will briefly explore the DLR-CNES instrument VEM (Venus Emissivity Mapper) proposed on two such missions, as well as the science case for futuristic projects and vehicles of in-situ exploration of the atmosphere and clouds of Venus. Meanwhile, the current coordinated campaign between large ground-based observatories covering several wavelength ranges (ALMA, JCMT, CFHT/ESPaDOnS, IRTF/TeXeS, IRTF/HIPWAC) has expanded Venus Express operations and allow to cross-validate techniques and monitor its rapidly changing atmospheric processes at complementary spatial and temporal scales. This cross-validation effort at the time the spacecraft is still acquiring data is essential to prepare the next decade of ground-based Venus exploration.