Liquid Water at Crater Gale, Mars

摘要: Suspicion that Mars could have transient liquid water on its surface through deliquescence of salts to form aqueous solutions or brines is an old proposal whose inquiry was boosted by Phoenix Lander observations. It provided some images what were claimed be brines, which presence at landing site compatible with the atmospheric parameters and composition soil observed. On other hand, so-called Recurrent Slope Lineae (RSL) often imaged orbiters, considered as another clue pointing occurrence phenomenon, since it thought they might caused it. Now, Curiosity rover has performed first insitu multi-instrumental study Mars’ surface, having collected most comprehensive environmental data set ever taken means their instruments Rover Environmental Monitoring Station (REMS), Dynamic Albedo Neutrons (DAN), Sample Analysis (SAM). REMS providing continuous accurate measurements relative humidity air temperatures among parameters, DAN SAM provide content regolith atmosphere respectively. these allowed establish existence a present day active cycle between regolith, changes according daily seasonal cycles, mediated during certain periods each every day. Importantly, shows conditions for are favourable even equatorial latitudes where, first, not due temperature conditions. This provides new keys understanding martian environment, opens interesting lines research studies future missions.