First Direct Image Of Carbon Dioxide Outside Of Our Solar System - Earth.Com
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NASA's James Webb Space Telescope (JWST) has taken direct images of multiple gas giants in the HR 8799 system. This young planetary system, located 130 light-years away, has been a focal point for planet formation studies.
The observations indicate that the planets in HR 8799 are rich in carbon dioxide. This suggests they formed in a similar way to Jupiter and Saturn.
Scientists believe they slowly built solid cores that attracted surrounding gas by means of gravitational force, a process called core accretion.
Webb ⁘s ability to analyze exoplanet atmospheres using spectroscopy has further confirmed these observations.
The Telescope's spectroscopic instruments help to identify atmospheric components in great detail.
"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," said William Balmer, of Johns Hopkins University in Baltimore.
"Given what we know about the star they orbit, that likely indicates they formed via core accretion, which is an exciting conclusion for planets that we can directly see."
HR 8799 is about 30 million years old ⁘ extremely young compared to our solar system's 4.6 billion years. Its planets still radiate heat from their formation, emitting strong infrared signals.
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