Abstract
It is the purpose of this paper to present evidence concerning the appearance of a sunspot in A.D. 939 observed by Arabs from the Iberian Peninsula. The sunspot record appears in the Arab source known as al-Muqtabis V.
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Vaquero, J., Gallego, M. Evidence for a sunspot in A.D. 939 in an Arabian Source. Sol Phys 206, 209–211 (2002). https://doi.org/10.1023/A:1014994811867
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DOI: https://doi.org/10.1023/A:1014994811867