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- J. Gregorio Portilla, Freddy Moreno, A manuscript of the late seventeenth century: first manifestation of an astronomical and chronological autochthonous study in the Nueva Granada , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 43 No. 167 (2019)
- J. Gregorio Portilla, Astronomical information in the first periodical publication of the New Kingdom of Granada , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 47 No. 185 (2023)
- J. Gregorio Portilla, Evolution of the geocentric theory of the Sun’s movement and its use in the first circumnavigation of the world , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 47 No. 184 (2023)
- J. Gregorio Portilla, Caldas and the big comet of 1807 , Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales: Vol. 42 (2018): Francisco José de Caldas
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Abstract
Observations of the great comet of 1807 carried out by Francisco José de Caldas are analyzed. Starting from astronomical observations obtained by European astronomers as well as the knowledge of the orbital elements, the trajectory of the comet is calculated and then is compared with those reported by Caldas, in particular that of the 26 of september of 1807 which includes coordinates. Items such as how Caldas calculated the coordinates along with morphological description of the object is discussed. We infer the existence of some type of atmospheric phenomena which hindered, for Caldas, the ideal observation of the tail. © 2017. Acad. Colomb. Cienc. Ex. Fis. Nat.References
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