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A forgotten naked-eye sunspot recorded by Galileo

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Abstract

Several authors have shown different interesting characteristics of the long time series of solar activity reconstructed from historical naked-eye sunspot observation. For this, it is essential to make use of catalogues of this kind of observation. The aim of this note is to show a naked eye sunspot observed by Galileo. This sunspot was seen by naked eye and by telescope. It is curious that it has been forgotten until now by the compilers of the naked-eye sunspots catalogues in spite of Galileo’s fame.

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  1. Departamento de Física, Escuela Politécnica, Universidad de Extremadura, Avda. de la Universidad s/n, 10071, Cáceres, Spain

    J. M. Vaquero

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  1. J. M. Vaquero
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Vaquero, J.M. A forgotten naked-eye sunspot recorded by Galileo. Sol Phys 223, 283–286 (2004). https://doi.org/10.1007/s11207-004-1041-y

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  • DOI: https://doi.org/10.1007/s11207-004-1041-y

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