58 relations: Adaptive optics, Aitken Double Star Catalogue, Apparent magnitude, Arabic, Asterism (astronomy), Astronomical spectroscopy, Bayer designation, Be star, Beta, Binary star, Bright Star Catalogue, Catalog of Components of Double and Multiple Stars, Catalogues of Fundamental Stars, Constellation, Crater-class cargo ship, Cygnus (constellation), Delta Cygni, Deneb, Double star, Durchmusterung, Effective temperature, Epoch (astronomy), Epsilon Cygni, Flamsteed designation, Gamma Cygni, Greek language, Haute-Provence Observatory, Henry Draper, Henry Draper Catalogue, Hipparcos, IAU Working Group on Star Names, Infrared, Interferometry, International Astronomical Union, International Celestial Reference System, Iris florentina, Kelvin, Kitt Peak National Observatory, Latin, Latinisation of names, Limb darkening, List of stars in Cygnus, Minute and second of arc, Monthly Notices of the Royal Astronomical Society, Northern Cross (asterism), Proper motion, Radial velocity, SIMBAD, Sisymbrium officinale, Smithsonian Astrophysical Observatory Star Catalog, ..., Speckle imaging, Spectroscopy, Sun, Telescope, UBV photometric system, United States Navy, USS Albireo (AK-90), Washington Double Star Catalog. Expand index (8 more) » « Shrink index
Adaptive optics (AO) is a technology used to improve the performance of optical systems by reducing the effect of incoming wavefront distortions by deforming a mirror in order to compensate for the distortion.
The Aitken Double Star Catalogue, or ADS, is a star catalogue of double stars.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Arabic (العَرَبِيَّة) or (عَرَبِيّ) or) is a Central Semitic language that first emerged in Iron Age northwestern Arabia and is now the lingua franca of the Arab world. It is named after the Arabs, a term initially used to describe peoples living from Mesopotamia in the east to the Anti-Lebanon mountains in the west, in northwestern Arabia, and in the Sinai peninsula. Arabic is classified as a macrolanguage comprising 30 modern varieties, including its standard form, Modern Standard Arabic, which is derived from Classical Arabic. As the modern written language, Modern Standard Arabic is widely taught in schools and universities, and is used to varying degrees in workplaces, government, and the media. The two formal varieties are grouped together as Literary Arabic (fuṣḥā), which is the official language of 26 states and the liturgical language of Islam. Modern Standard Arabic largely follows the grammatical standards of Classical Arabic and uses much of the same vocabulary. However, it has discarded some grammatical constructions and vocabulary that no longer have any counterpart in the spoken varieties, and has adopted certain new constructions and vocabulary from the spoken varieties. Much of the new vocabulary is used to denote concepts that have arisen in the post-classical era, especially in modern times. During the Middle Ages, Literary Arabic was a major vehicle of culture in Europe, especially in science, mathematics and philosophy. As a result, many European languages have also borrowed many words from it. Arabic influence, mainly in vocabulary, is seen in European languages, mainly Spanish and to a lesser extent Portuguese, Valencian and Catalan, owing to both the proximity of Christian European and Muslim Arab civilizations and 800 years of Arabic culture and language in the Iberian Peninsula, referred to in Arabic as al-Andalus. Sicilian has about 500 Arabic words as result of Sicily being progressively conquered by Arabs from North Africa, from the mid 9th to mid 10th centuries. Many of these words relate to agriculture and related activities (Hull and Ruffino). Balkan languages, including Greek and Bulgarian, have also acquired a significant number of Arabic words through contact with Ottoman Turkish. Arabic has influenced many languages around the globe throughout its history. Some of the most influenced languages are Persian, Turkish, Spanish, Urdu, Kashmiri, Kurdish, Bosnian, Kazakh, Bengali, Hindi, Malay, Maldivian, Indonesian, Pashto, Punjabi, Tagalog, Sindhi, and Hausa, and some languages in parts of Africa. Conversely, Arabic has borrowed words from other languages, including Greek and Persian in medieval times, and contemporary European languages such as English and French in modern times. Classical Arabic is the liturgical language of 1.8 billion Muslims and Modern Standard Arabic is one of six official languages of the United Nations. All varieties of Arabic combined are spoken by perhaps as many as 422 million speakers (native and non-native) in the Arab world, making it the fifth most spoken language in the world. Arabic is written with the Arabic alphabet, which is an abjad script and is written from right to left, although the spoken varieties are sometimes written in ASCII Latin from left to right with no standardized orthography.
In observational astronomy, an asterism is a popular known pattern or group of stars that are recognised in the night sky.
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light and radio, which radiates from stars and other celestial objects.
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.
Be Stars are a heterogeneous set of stars with B spectral types and emission lines.
Beta (uppercase, lowercase, or cursive; bē̂ta or βήτα) is the second letter of the Greek alphabet.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
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.
The Catalog of Components of Double and Multiple Stars, or CCDM, is an astrometric star catalogue of double and multiple stars.
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.
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
Crater-class cargo ship is a category of freighter that was constructed for use by the United States Navy during World War II under Maritime Commission EC2-S-C1 type.
Cygnus is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan.
Delta Cygni (δ Cygni, abbreviated Delta Cyg, δ Cyg) is a binary star of a combined third-magnitude in the constellation of Cygnus and part of the Southern Cross asterism (whose brightest star is Deneb).
Deneb, also designated α Cygni (Latinised alpha Cygni, abbreviated Alpha Cyg, α Cyg), is the brightest star in the constellation of Cygnus.
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
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.
The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.
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.
Epsilon Cygni (ε Cygni, abbreviated Eps Cyg, ε Cyg) is multiple star system in the constellation of Cygnus.
A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.
Gamma Cygni (γ Cygni, abbreviated Gamma Cyg, γ Cyg), also named Sadr, is a star in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross.
Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.
The Haute-Provence Observatory (OHP, Observatoire de Haute-Provence) is an astronomical observatory in the southeast of France, about 90 km east of Avignon and 100 km north of Marseille.
Henry Draper (March 7, 1837 – November 20, 1882) was an American doctor and amateur astronomer.
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.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
The International Astronomical Union (IAU) established a Working Group on Star Names (WGSN) in May 2016 to catalog and standardize proper names for stars for the international astronomical community.
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.
The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).
Iris florentina is the white flowered variant of Iris germanica now classified as Iris germanica nothovar.
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
The Kitt Peak National Observatory (KPNO) is a United States astronomical observatory located on Kitt Peak of the Quinlan Mountains in the Arizona-Sonoran Desert on the Tohono O'odham Nation, west-southwest of Tucson, Arizona.
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
Latinisation or Latinization is the practice of rendering a non-Latin name (or word) in a Latin style.
Limb darkening is an optical effect seen in stars (including the Sun), where the center part of the disk appears brighter than the edge or limb of the image.
This is the list of notable stars in the constellation of Cygnus, sorted by decreasing apparent magnitude.
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
The Northern Cross is a prominent astronomical asterism in the northern hemisphere celestial sphere, corresponding closely with the constellation Cygnus The Swan.
Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.
The radial velocity of an object with respect to a given point is the rate of change of the distance between the object and the point.
SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.
Sisymbrium officinale, known as hedge mustard, (formerly Erysimum officinale) is a plant in the family Brassicaceae.
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
Image:Zeta_bootis_short_exposure.png|Typical short-exposure image of a binary star (Zeta Bootis in this case) as seen through atmospheric seeing.
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
The Sun is the star at the center of the Solar System.
A telescope is an optical instrument that aids in the observation of remote objects by collecting electromagnetic radiation (such as visible light).
The UBV photometric system (Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a wide band photometric system for classifying stars according to their colors.
The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States.
The USS Albireo (AK-90) was a in the service of the US Navy in World War II and manned by a US Coast Guard crew.
The Washington Double Star Catalog, or WDS, is a catalog of double stars, maintained at the United States Naval Observatory.
6 Cyg, 6 Cyg A, 6 Cyg B, 6 Cygni, 6 Cygni A, 6 Cygni B, ADS 12540 A, ADS 12540 B, ALBEREO, ALBIREO, Albereo, Albireo (star), BD +27 3410, BD +27 3411, Beta Cyg A, Beta Cyg B, Beta Cygni, Beta Cygni A, Beta Cygni B, Beta-1 Cyg, Beta-1 Cygni, Beta-2 Cyg, Beta-2 Cygni, Beta1 Cyg, Beta1 Cygni, Beta2 Cyg, Beta2 Cygni, Beta² Cyg, Beta² Cygni, Beta¹ Cyg, Beta¹ Cygni, CCDM J19307+2758A, CCDM J19307+2758B, FK5 732, GC 26953, GC 26956, HD 183912, HD 183913, HD 183914, HIP 95947, HIP 95951, HR 7417, HR 7418, PPM 109139, PPM 109141, SAO 87301, SAO 87302, Β Cyg, Β Cyg A, Β Cyg B, Β Cygni, Β Cygni A, Β Cygni B, Β-1 Cyg, Β-1 Cygni, Β-2 Cyg, Β-2 Cygni, Β1 Cyg, Β1 Cygni, Β2 Cyg, Β2 Cygni, Β² Cyg, Β² Cygni, Β¹ Cyg, Β¹ Cygni.