Tag #K2-18B

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Apr 17, 22:11

Controversial Claim: Evidence of Extraterrestrial Life on K2-18b

Scientists at the University of Cambridge announced finding dimethylsulfide and dimethyldisulfide in the atmosphere of exoplanet K2-18b, considered strong evidence of extraterrestrial life, although the 3-sigma significance level and a self-developed model have raised skepticism within the scientifi...

Controversial Claim: Evidence of Extraterrestrial Life on K2-18b

Scientists at the University of Cambridge announced finding dimethylsulfide and dimethyldisulfide in the atmosphere of exoplanet K2-18b, considered strong evidence of extraterrestrial life, although the 3-sigma significance level and a self-developed model have raised skepticism within the scientifi...

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What specific evidence supports the claim of extraterrestrial life on K2-18b, and what is the statistical significance of this evidence compared to the standard for such a discovery?

Researchers at the University of Cambridge claim to have found the strongest evidence yet for extraterrestrial life on exoplanet K2-18b, detecting dimethylsulfide (DMS) and dimethyldisulfide (DMDS) in its atmosphere – substances primarily produced by microorganisms on Earth. However, this evidence is based on a 3-sigma significance level, meaning there's a 0.3% chance the signal is random; the standard for such a claim is 5-sigma.

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Apr 17, 16:15

Potential Biosignatures Detected on Exoplanet K2-18b

Astronomers detected dimethyl sulfide and dimethyl disulfide in the atmosphere of exoplanet K2-18b using the James Webb Space Telescope, suggesting potential microbial life; however, other experts require stronger evidence before confirming this claim.

Potential Biosignatures Detected on Exoplanet K2-18b

Astronomers detected dimethyl sulfide and dimethyl disulfide in the atmosphere of exoplanet K2-18b using the James Webb Space Telescope, suggesting potential microbial life; however, other experts require stronger evidence before confirming this claim.

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What are the main criticisms of the study's methodology and conclusions, and how could these criticisms be addressed in future research?

The detection of DMS and DMDS on K2-18b, a Neptune-like exoplanet 120 light-years away, is based on observations from the James Webb Space Telescope. While these gases are associated with microbial life on Earth, alternative abiotic explanations are possible. The 3-sigma confidence level of the finding is considered insufficient by some experts, who advocate for a 5-sigma level for definitive confirmation.

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