NASA's Webb telescope rules out two new Dyson sphere candidates

NASA's Webb telescope ruled out two new Dyson sphere candidates. The search was conducted using the James Webb Space Telescope to observe two M-dwarf stars. The findings indicate that the infrared excess observed is not from Dyson spheres but from background galaxies. One of the stars shows characteristics consistent with a Hot Dust Obscured Galaxy, while the other has an extended morphology with a dusty starburst spectrum. These results highlight the difficulty in detecting technosignatures from advanced civilizations. The two stars were part of a survey of 1 million stars within 1,000 light-years of Earth, first conducted with Gaia and WISE. The study emphasizes the need for higher-resolution data in future searches, as background galaxies can contaminate results. The research underscores the challenge of identifying artificial megastructures, even from distant stars. The findings suggest that while Dyson spheres are a plausible concept, the presence of background galaxies complicates detection. The study also mentions that a fraction of the candidates may be contaminated, but mid-infrared telescopes in the 2030s could provide better resolution. The research highlights the importance of variability in starlight for detecting artificial structures.

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