43 relations: Apparent magnitude, Argentina, Astrometry, Astronomische Gesellschaft Katalog, Astronomy, Astrophysics, Berlin, Bonn, Cape Town, Carte du Ciel, Catalogues of Fundamental Stars, Córdoba, Argentina, Celestial cartography, Celestial coordinate system, Celestial mechanics, Double star, Durchmusterung, Earth's rotation, Ecliptic, Electromagnetic spectrum, Equinox, Equinox (celestial coordinates), Gaia (spacecraft), Geodesy, Geodetic astronomy, Germany, Hipparcos, Observatory, Photography, Radio astronomy, Reference, Scientific community, Sirius, Smithsonian Astrophysical Observatory Star Catalog, Solar System, South Africa, Southern Hemisphere, Star, Star catalogue, Star number, Tycho-2 Catalogue, Visible spectrum, Visual system.
The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.
Argentina, officially the Argentine Republic (República Argentina), is a federal republic located in southeastern South America.
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Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.
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The Astronomische Gesellschaft Katalog (AGK) is an astrometric star catalogue.
Astronomy is a natural science which is the study of celestial objects (such as stars, galaxies, planets, moons, asteroids, comets and nebulae), the physics, chemistry, and evolution of such objects, and phenomena that originate outside the atmosphere of Earth, including supernovae explosions, gamma ray bursts, and cosmic microwave background radiation.
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Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the heavenly bodies, rather than their positions or motions in space." Among the objects studied are the Sun, other stars, galaxies, extrasolar planets, the interstellar medium and the cosmic microwave background.
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Berlin is the capital of Germany and one of the 16 states of Germany.
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Bonn, officially the Federal City of Bonn, is a city on the banks of the Rhine and northwest of the Siebengebirge (Seven Mountains) in the German state of North Rhine-Westphalia, with a population of 311,287 within its administrative limits.
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Cape Town (Kaapstad; Ikapa) ranks third among the most populous urban areas in South Africa, after Johannesburg, and has roughly the same population as the Durban Metropolitan Area.
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The Carte du Ciel (literally, 'Map of the Sky') and the Astrographic Catalogue (or Astrographic Chart) were two distinct but connected components of a massive international astronomical project, initiated in the late 19th century, to catalogue and map the positions of millions of stars as faint as 11th or 12th magnitude.
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The Catalogue of Fundamental Stars is a series of six astrometric catalogues of high precision positional data for a small selection of stars to define a celestial reference frame, which is a standard coordinate system for measuring positions of stars.
Córdoba is a city located in the geographical center of Argentina, in the foothills of the Sierras Chicas on the Suquía River, about northwest of Buenos Aires.
Celestial cartography, uranography or star cartography is the fringe of astronomy and branch of cartography concerned with mapping stars, galaxies, and other astronomical objects on the celestial sphere.
In astronomy, a celestial coordinate system is a system for specifying positions of celestial objects: satellites, planets, stars, galaxies, and so on.
Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects.
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
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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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Earth's rotation is the rotation of the planet Earth around its own axis.
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The ecliptic is the apparent path of the Sun on the celestial sphere, and is the basis for the ecliptic coordinate system.
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The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.
An equinox is an astronomical event in which the plane of Earth's equator passes the center of the Sun.
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In astronomy, equinox is a moment in time at which the vernal point, celestial equator, and other such elements are taken to be used in the definition of a celestial coordinate system.
Gaia is a space observatory of the European Space Agency (ESA) designed for astrometry.
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Geodesy, — also known as geodetics or geodetics engineering — a branch of applied mathematics and earth sciences, is the scientific discipline that deals with the measurement and representation of the Earth, including its gravitational field, in a three-dimensional time-varying space.
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Geodetic astronomy is the application of astronomical methods into networks and technical projects of geodesy.
Germany (Deutschland), officially the Federal Republic of Germany (Bundesrepublik Deutschland), is a federal parliamentary republic in western-central Europe.
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Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
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An observatory is a location used for observing terrestrial or celestial events.
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Photography is the science, art and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
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Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies.
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Reference is a relation between objects in which one object designates, or acts as a means by which to connect to or link to, another object.
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The scientific community is a diverse network of interacting scientists.
Sirius is the brightest star (in fact, a star system) in the Earth's night sky.
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The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
The Solar SystemCapitalization of the name varies.
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South Africa, officially the Republic of South Africa, is the southernmost country in Africa.
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The Southern Hemisphere of Earth is the half which is south of the equator.
A star is a luminous sphere of plasma held together by its own gravity.
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A star catalogue, or star catalog, is an astronomical catalogue that lists stars.
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A star number is a centered figurate number that represents a centered hexagram (six-pointed star), such as the one that Chinese checkers is played on.
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The Tycho-2 Catalogue is a catalogue of more than 2.5 million of the brightest stars.
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The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
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The visual system is the part of the central nervous system which gives organisms the ability to process visual detail, as well as enabling the formation of several non-image photo response functions.
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