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The seven suns of Rome

A diagram lost for more than 350 years documents a spectacular sky of 1630.

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  1. Seidenfaden, E. Appl. Opt. 50, F60-F63 (2011).

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  2. Tape, W., Seidenfaden, E. & Können, G. P. Appl. Opt. 47, H72-H84 (2008).

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Walter Tape

Gunther Können

Fokko Jan Dijksterhuis

1630 diagram in the virtual Herzog August Library Wolfenbüttel

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McAlpine, K. The seven suns of Rome. Nature (2011).

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