Searching and Characterizing Extraterrestrial Subsurface Oceans
The existence of liquid water is one of the few preconditions for life as we know it. Therefore, the search and characterization of liquid water outside of Earth plays an essential role in the search for extraterrestrial life. Pro...
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Duración del proyecto: 65 meses
Fecha Inicio: 2020-04-27
Fecha Fin: 2025-09-30
Líder del proyecto
UNIVERSITAT ZU KOLN
No se ha especificado una descripción o un objeto social para esta compañía.
TRL
4-5
Presupuesto del proyecto
2M€
Fecha límite de participación
Sin fecha límite de participación.
Descripción del proyecto
The existence of liquid water is one of the few preconditions for life as we know it. Therefore, the search and characterization of liquid water outside of Earth plays an essential role in the search for extraterrestrial life. Prominent candidates to host liquid water are moons in the outer solar system, which can maintain oceans under their icy surfaces. The currently most effective way to identify such subsurface oceans is through effects of their salinity and thus electrical conductivity. The conductivity modifies the magnetic field around these moons through a process referred to as electromagnetic induction. Spacecraft measurements of associated magnetic field perturbations provided evidence for oceans within Jupiter’s moon Europa and Ganymede. Current analysis tools however reached an impasse. No scientific techniques are available, which provide quantitative estimates and uncertainties of key ocean properties when the effects of the dense magnetized plasmas around the moons are included. Here we propose entirely new approaches, which overcome these issues. Our novel techniques will include a simultaneous treatment of the physics in all internal and external conductive layers and will for the first time use all available observations including auroral emission to go beyond considering magnetic fields only. EXO-OCEANS will systematically characterize the ocean properties on Europa and Ganymede including the ocean candidate Callisto. Characterizing the oceans on Ganymede, Europa and Callisto are at the heart of ESA’s Juice and NASA’s Europa Clipper missions. For Saturn’s moons Titan and Enceladus where currently existing techniques do not work, we will invent a new detection technique. In parallel we will use the Hubble Space Telescope to search and characterize aurora in extrasolar planetary systems to pave the way for ocean detections beyond the solar system.