JWST Spots CO₂ Ice on Europa
The James Webb Space Telescope has detected CO₂ ice on Europa's Tara Regio, with reanalyzed 2023 data suggesting the subsurface ocean is venting through the ice shell. The discovery boosts habitability prospects for Jupiter's moon ahead of NASA's Europa Clipper mission arrival.
- The carbon dioxide is concentrated in a 1,800-kilometer-wide area known as Tara Regio, a "chaos terrain" of disrupted ice blocks. This region also contains a high concentration of sodium chloride, the same as table salt on Earth. - Scientists believe the CO₂ was sourced from Europa's subsurface ocean and brought to the surface, rather than being delivered by external sources like meteorites. Its presence in a geologically young area suggests it was deposited recently. - The presence of carbon, a vital element for life as we know it, originating from the ocean significantly advances the case for the ocean's potential habitability. - NASA's Europa Clipper mission, which launched in October 2024, is scheduled to arrive at the Jupiter system in April 2030. - The Europa Clipper will not orbit Europa directly but will conduct 49 close flybys of the moon at altitudes ranging from 25 to 2,700 kilometers. - The mission's primary objectives are to confirm the existence and characteristics of the subsurface ocean, analyze the chemical composition of the surface and ocean, and study the geology of the ice shell. - While the discovery of ocean-sourced carbon is a positive sign for habitability, some recent studies suggest Europa's seafloor may lack sufficient volcanic activity to create the hydrothermal vents considered necessary for life.
