Tue Mar 18 14:36:41 UTC 2025: ## Webb Telescope Makes Groundbreaking Discovery: First Direct Image of Carbon Dioxide on Exoplanets
**Baltimore, MD** – The James Webb Space Telescope (JWST) has achieved a monumental feat, capturing the first-ever direct images of carbon dioxide in the atmosphere of exoplanets orbiting the star HR 8799, located 130 light-years from Earth. This discovery, announced today by NASA, offers compelling evidence that these giant planets formed through core accretion, a process mirroring the formation of Jupiter and Saturn in our own solar system.
The breakthrough was made possible by JWST’s advanced coronagraphs, which effectively block the star’s intense light, allowing for detailed observation of the planets. By focusing on specific infrared wavelengths, the telescope was able to detect the distinctive signature of carbon dioxide in the exoplanets’ atmospheres. This marks a significant advancement beyond previous indirect methods of exoplanet atmospheric analysis.
“By spotting these strong carbon dioxide features, we have shown there is a sizable fraction of heavier elements, like carbon, oxygen, and iron, in these planets’ atmospheres,” explained William Balmer of Johns Hopkins University. “Given what we know about the star they orbit, that likely indicates they formed via core accretion.”
The HR 8799 system, a relatively young 30 million years old, offers a unique opportunity for studying planetary formation. The planets, still radiating heat from their formation, emit infrared light detectable by JWST, enabling scientists to differentiate between core accretion and disk instability – the two primary models of giant planet formation.
This discovery is crucial for understanding the diversity of planetary systems beyond our own. By directly imaging and analyzing the atmospheres of exoplanets, scientists can gain valuable insights into the processes that shape planetary systems and ultimately, our place within the cosmos. As Balmer noted, the research aims to “understand our solar system, life, and ourselves in comparison to other exoplanetary systems…to see how they’re similar or different when compared to ours.” The ability of JWST to directly image exoplanets, previously a significant challenge due to their faintness compared to their host stars, opens a new era in exoplanet research.
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