16 relations: Andromeda (constellation), Bright Star Catalogue, Constellation, Durchmusterung, Henry Draper Catalogue, Mira variable, Nucleosynthesis, Paul W. Merrill, S-type star, Science (journal), Smithsonian Astrophysical Observatory Star Catalog, Spectral line, Stellar classification, Technetium, Variable star, Zirconium.
Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations.
The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).
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In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.
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The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.
Mira variables, named after the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.
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Nucleosynthesis is the process that creates new atomic nuclei from pre-existing nucleons, primarily protons and neutrons.
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Paul Willard Merrill (August 15, 1887 – July 19, 1961) was an American astronomer whose specialty was spectroscopy.
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A star with spectral type S is a late-type giant star (similar to class K5–M) whose spectrum displays bands from zirconium oxide, in addition to the titanium oxide bands characteristically exhibited by K and M class giant stars.
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Science, also widely referred to as Science Magazine, is the academic journal of the American Association for the Advancement of Science (AAAS) and is one of the world's top scientific journals.
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The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
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In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Technetium is a chemical element with symbol Tc and atomic number 43.
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A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
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Zirconium is a chemical element with symbol Zr and atomic number 40.
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