No telescope has ever detected carbon dioxide in an exoplanet atmosphere before.
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Carbon dioxide has never been detected on any exoplanet before. But astronomers hope that the compound can help them better understand the formation history and evolution of the planets where it's found, scientists said. "This unequivocal detection of carbon dioxide is a major milestone for exoplanet atmosphere characterisation," Laura Kreidberg, director of the Max Planck Institute for Astronomy in Germany and co-author of a paper describing the discovery, said in a."Carbon dioxide helps us measure the complete carbon and oxygen inventory of the atmosphere, which is highly sensitive to the conditions in the disk where the planet formed.
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