The nature of planets orbiting stars in other systems will be the focus for ESA’s fourth medium-class science mission, to be launched in mid 2028. Ariel, the Atmospheric Remote-sensing Infrared Exoplanet Large-survey mission, was selected by ESA today as part of its Cosmic Vision plan. The mission addresses one of the key themes of Cosmic Vision: What are the conditions for planet formation and the emergence of life?
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