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The Book of Fixed Stars is representative of the concerns of Islamic scholars during the late-9th to 11th centuries, where following the translation of Hellenistic texts from Greek to Arabic, "Islamic astronomers and astrologers concentrated on analyzing, criticizing, and perfecting the geometrical models of Ptolemy". [3]
Another ten have the same stars but different names. [30] Biblical scholar E. W. Bullinger interpreted some of the creatures mentioned in the books of Ezekiel and Revelation as the middle signs of the four-quarters of the Zodiac, [32] [33] with the Lion as Leo, the Bull as Taurus, the Man representing Aquarius, and the Eagle standing in for ...
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines.
Bust depicting Zosimos, 3rd century Distillation equipment of Zosimos, from the 15th century Byzantine Greek manuscript Codex Parisinus 2327. [1]Zosimos of Panopolis (Greek: Ζώσιμος ὁ Πανοπολίτης; also known by the Latin name Zosimus Alchemista, i.e. "Zosimus the Alchemist") was an alchemist and Gnostic mystic.
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
Medical Heritage Library b24883980 (User talk:Fæ/IA books#Fork10) (batch 1751-1899 #86852) File usage No pages on the English Wikipedia use this file (pages on other projects are not listed).
A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
Giant stars have a much lower surface gravity than do main sequence stars, while the opposite is the case for degenerate, compact stars such as white dwarfs. The surface gravity can influence the appearance of a star's spectrum, with higher gravity causing a broadening of the absorption lines .