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18 relations: Astronomy & Astrophysics, Durchmusterung, Epoch (astronomy), Henry Draper Catalogue, Hipparcos, International Celestial Reference System, List of X-ray pulsars, Neutron star, Progress of Theoretical and Experimental Physics, Random walk, Smithsonian Astrophysical Observatory Star Catalog, Solar mass, Stellar wind, Supergiant star, The Astrophysical Journal, Uhuru (satellite), Vela (constellation), X-ray binary.
Astronomy & Astrophysics
Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
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Durchmusterung
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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Epoch (astronomy)
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
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Henry Draper Catalogue
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.
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Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
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International Celestial Reference System
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
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List of X-ray pulsars
This is a partial list of known accretion-powered pulsars, as of 1997.
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Neutron star
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
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Progress of Theoretical and Experimental Physics
Progress of Theoretical and Experimental Physics is a monthly peer-reviewed scientific journal published by Oxford University Press on behalf of the Physical Society of Japan.
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Random walk
A random walk is a mathematical object, known as a stochastic or random process, that describes a path that consists of a succession of random steps on some mathematical space such as the integers.
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Smithsonian Astrophysical Observatory Star Catalog
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
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Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
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Stellar wind
A stellar wind is a flow of gas ejected from the upper atmosphere of a star.
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Supergiant star
Supergiants are among the most massive and most luminous stars.
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The Astrophysical Journal
The Astrophysical Journal, often abbreviated ApJ (pronounced "ap jay") in references and speech, is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
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Uhuru (satellite)
Uhuru was the first satellite launched specifically for the purpose of X-ray astronomy.
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Vela (constellation)
Vela is a constellation in the southern sky.
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X-ray binary
X-ray binaries are a class of binary stars that are luminous in X-rays.
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4U 0900-40, GP Vel, GP Velorum, HD 77581, Vela X-I.
