The B-mode polarization pattern observed by the ground-based BICEP2 telescope at the South Pole was ultimately found to be caused by interstellar dust rather than primordial gravitational waves.
Sources
- LiteBIRD aims to find evidence for the greatest expansion in the history of the Universe (cosmos.isas.jaxa.jp)
- https://physics.aps.org/articles/v8/21 (physics.aps.org)
- https://www.astronomy.com/science/gravitational-waves-remain-elusive-according-to-planck/ (astronomy.com)
- https://arxiv.org/pdf/1501.04288 (arxiv.org)
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