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Epsilon Indi, Latinized from ε Indi, is a star system located at a distance of approximately 12 light-years from Earth in the southern constellation of Indus.The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.674. [2]
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The FBISE was established under the FBISE Act 1975. [2] It is an autonomous body of working under the Ministry of Federal Education and Professional Training. [3] The official website of FBISE was launched on June 7, 2001, and was inaugurated by Mrs. Zobaida Jalal, the Minister for Education [4] The first-ever online result of FBISE was announced on 18 August 2001. [5]
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 ...
Delta Equulei is a binary star system about 60 light years away, [9] with components of class G0 and F5. [10] Their combined magnitude is 4.47, and their absolute magnitude is 3.142. There is controversy as to the exact masses of the stars. One study puts the larger at 1.22 solar masses and the smaller at 1.17, while another pegs them at 1.66 ...
The white dwarf luminosity function (WDLF) gives the number of white dwarf stars with a given luminosity. As this is determined by the rates at which these stars form and cool, it is of interest for the information it gives about the physics of white dwarf cooling and the age and history of the Galaxy. [3] [4]
RR Lyrae is a variable star in the Lyra constellation, figuring in its west near to Cygnus. [10] As the brightest star in its class, [11] it became the eponym for the RR Lyrae variable class of stars [3] and it has been extensively studied by astronomers. [7] RR Lyrae variables serve as important standard candles that are used to measure ...
By comparing astronomical observations with laboratory measurements, astrochemists can infer the elemental abundances, chemical composition, and temperatures of stars and interstellar clouds. This is possible because ions , atoms , and molecules have characteristic spectra: that is, the absorption and emission of certain wavelengths (colors) of ...