File:Atmosphere Composition of Exoplanet K2-18 b (NIRISS & NIRSpec) (2023-139).jpg
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English: Spectra of K2-18 b, obtained with Webb’s NIRISS (Near-Infrared Imager and Slitless Spectrograph) and NIRSpec (Near-Infrared Spectrograph) displays an abundance of methane and carbon dioxide in the exoplanet’s atmosphere, as well as a possible detection of a molecule called dimethyl sulfide (DMS).
The detection of methane and carbon dioxide, and shortage of ammonia, are consistent with the presence of an ocean underneath a hydrogen-rich atmosphere in K2-18 b. K2-18 b, 8.6 times as massive as Earth, orbits the cool dwarf star K2-18 in the habitable zone and lies 110 light years from Earth. NASA, ESA, CSA, Ralf Crawford (STScI), Joseph Olmsted (STScI) Nikku Madhusudhan (IoA) |
| Date | 11 September 2023 (upload date) |
| Source | Atmosphere Composition of Exoplanet K2-18 b (NIRISS & NIRSpec) |
| Author | Illustration NASA, ESA, CSA, Ralf Crawford (STScI), Joseph Olmsted (STScI) Science Nikku Madhusudhan (IoA) |
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This file is in the public domain because it was created by NASA, ESA and CSA. NASA Webb material is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA/CSA is credited as the source of the material. This license does not apply if source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-03127. Copyright statement at webbtelescope.org. For material created by the European Space Agency on the esawebb.org site, use the {{ESA-Webb}} tag. |
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| current | 10:30, 12 September 2023 | | 1,920 × 1,080 (355 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://stsci-opo.org/STScI-01H9RF45S5FAMYBVZXV0571Y9S.jpg via Commons:Spacemedia |
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