New stellar occultation data from 2017-2023 indicates Pluto's atmospheric pressure plateaued from 2015 to 2021 and has started to drop, with lower-atmosphere slope changes consistent with haze settling.
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Non-detection of CH4 and CO fluorescence in JWST spectra sets upper limits on their surface partial pressures at (3-10)×10^{-6} and (50-300)×10^{-6} nbar, well below the 100-200 nbar total pressure from occultation data.
citing papers explorer
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Changes in Pluto's Atmosphere Based on Stellar Occultation Data from 2017 to 2023
New stellar occultation data from 2017-2023 indicates Pluto's atmospheric pressure plateaued from 2015 to 2021 and has started to drop, with lower-atmosphere slope changes consistent with haze settling.
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Constraints on the Atmospheric Composition of 2002 XV$_{93}$ from JWST Spectroscopy
Non-detection of CH4 and CO fluorescence in JWST spectra sets upper limits on their surface partial pressures at (3-10)×10^{-6} and (50-300)×10^{-6} nbar, well below the 100-200 nbar total pressure from occultation data.