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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).
Stars can form orbital systems with other astronomical objects, as in planetary systems and star systems with two or more stars. When two such stars orbit closely, their gravitational interaction can significantly impact their evolution. Stars can form part of a much larger gravitationally bound structure, such as a star cluster or a galaxy.
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.
Al-Ṣūfī's Book of the Constellations of the Fixed Stars and its Influence on Islamic and Western Celestial Cartography - includes a detailed bibliography and a list of all known manuscripts of al-Ṣūfī's Book of the Fixed Stars. Forgotten History: Al-Sufi's Book Of Fixed Stars Slides and audio recording from a presentation on the book ...
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 ...
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.
A characteristic of population II stars is that despite their lower overall metallicity, they often have a higher ratio of alpha elements (elements produced by the alpha process, like oxygen and neon) relative to iron (Fe) as compared with population I stars; current theory suggests that this is the result of type II supernovas being more ...
Other editions were: Chatto and Windus, London, 1975; "A New Way to see the Stars", Paul Hamlyn, London, 1966; Enl. World-wide ed. Houghton Mifflin, 1967. In this book, Rey set out to create a graphical, simpler view of the constellations that created a more realistic depiction of the images the constellations were supposed to represent.