A diagram lost for more than 350 years documents a spectacular sky of 1630.
References
Seidenfaden, E. Appl. Opt. 50, F60-F63 (2011).
Tape, W., Seidenfaden, E. & Können, G. P. Appl. Opt. 47, H72-H84 (2008).
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1630 diagram in the virtual Herzog August Library Wolfenbüttel
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McAlpine, K. The seven suns of Rome. Nature (2011). https://doi.org/10.1038/news.2011.567
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DOI: https://doi.org/10.1038/news.2011.567
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