Using the joint NASA/European Space Agency/Canadian Space Agency James Webb Space Telescope, scientists have discovered the presence of carbon-bearing molecules within the atmosphere of exoplanet K2-18 b. Methane and carbon dioxide are among these carbon-bearing molecules.
The discovery of the molecules is allowing scientists to better understand K2-18 b. The planet has been the subject of several recent studies and is theorized to be a Hycean exoplanet — a planet that could possibly feature a hydrogen-rich atmosphere and a surface covered by water.