Astrónomos descubren evidencias de vapor de agua en una luna de Júpiter
Astronomers have confirmed for the first time the presence of water vapor in the atmosphere of Ganymede, Jupiter’s largest moon. This discovery is based on the reanalysis of historical and recent data from the Hubble Space Telescope, which revealed that the observed variations in ultraviolet auroras do not correspond to atomic oxygen, as previously believed, but rather to the sublimation of surface ice caused by solar heating. This confirms that the moon possesses a dynamic exosphere in which water transitions directly from solid to gas. The finding implies that Ganymede contains a significantly greater amount of water than all of Earth’s oceans combined, although this water resides primarily as surface ice or in a deep subsurface ocean. The direct detection of water vapor corrects earlier interpretations that were based solely on oxygen molecules generated by the erosion of charged particles, offering a more accurate understanding of the atmospheric chemistry and extreme thermal conditions on this icy body. This advance is relevant to the field of open data because it demonstrates the immense value of preserving, sharing, and reanalyzing public scientific datasets over the long term. By combining historical archives with new observations, the scientific community can refine models without immediately repeating costly missions, thereby optimizing preparation for future space exploration and facilitating global collaboration in the search for extraterrestrial habitability.
Source: publico.esPublished on 2023-03-29