Long-term multi-wavelength monitoring of a jet from a supermassive black hole reveals that more intense periods of variability in brightness occur when the jet is pointed more directly at Earth, thereby strengthening the geometric interpretation of long-term changes in brightness.
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Meyer, E. A cosmic jet swinging our way. Nat Astron 2, 32–33 (2018). https://doi.org/10.1038/s41550-017-0349-0
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DOI: https://doi.org/10.1038/s41550-017-0349-0
