72 relations: Absolute magnitude, Alpha Lacertae, Andromeda in Chinese astronomy, Apparent magnitude, AR Cassiopeiae, Astronomical spectroscopy, Astronomical unit, Bayer designation, Beta Lacertae, Betelgeuse, Boss General Catalogue, Bright Star Catalogue, Carbon, Cassiopeia (constellation), Cassiopeia in Chinese astronomy, Catalogues of Fundamental Stars, Centre de données astronomiques de Strasbourg, Cepheid variable, Cepheus in Chinese astronomy, Chinese constellations, CNO cycle, Cygnus in Chinese astronomy, Dredge-up, Durchmusterung, Earth mass, Eddington luminosity, Encampment (Chinese constellation), Epsilon Cephei, Flamsteed designation, Flying serpent (asterism), General Catalogue of Variable Stars, HD 206267, Helium, Henry Draper Catalogue, Hipparcos, Iota Andromedae, Johann Bayer, John Flamsteed, Jupiter, Kappa Andromedae, Kelvin, Lacerta in Chinese astronomy, Lambda Andromedae, Milky Way, Neptune, Nitrogen, Oxygen, Pi1 Cygni, Pi2 Cygni, Pistol Star, ..., Psi Andromedae, Red supergiant star, Right ascension, Semiregular variable star, Sigma Cassiopeiae, Smithsonian Astrophysical Observatory Star Catalog, Sodium, Solar mass, Sun, Tau Cassiopeiae, Triple-alpha process, Twenty-Eight Mansions, Uranometria, V509 Cassiopeiae, VY Canis Majoris, William Herschel Telescope, Yellow hypergiant, 3 Andromedae, 4 Lacertae, 7 Andromedae, 8 Andromedae, 9 Lacertae. Expand index (22 more) » « Shrink index
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
Alpha Lacertae (Alpha Lac, α Lacertae, α Lac) is an A-type main sequence star in the constellation of Lacerta.
The modern constellation Andromeda lies across two of the quadrants, symbolized by the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ) and the White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ), that divide the sky in traditional Chinese uranography.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
AR Cassiopeiae (AR Cas) is a multiple star system in the constellation of Cassiopeia.
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.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
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.
Beta Lacertae (Beta Lac, β Lacertae, β Lac) is the fourth-brightest star in the constellation of Lacerta.
Betelgeuse, also designated Alpha Orionis (α Orionis, abbreviated Alpha Ori, α Ori), is the ninth-brightest star in the night sky and second-brightest in the constellation of Orion.
Boss General Catalogue (GC, sometimes General Catalogue) is an astronomical catalogue containing 33,342 stars.
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.
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty.
The modern constellation Cassiopeia lies across two of the quadrants symbolized by the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ), The White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ) and Three Enclosures (三垣, Sān Yuán), that divide the sky in traditional Chinese uranography.
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.
The Centre de Données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.
A Cepheid variable is a type of star that pulsates radially, varying in both diameter and temperature and producing changes in brightness with a well-defined stable period and amplitude.
The modern constellation Cepheus lies across one of the quadrants symbolized by the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ), and Three Enclosures (三垣, Sān Yuán), that divide the sky in traditional Chinese uranography.
Traditional Chinese astronomy has a system of dividing the celestial sphere into asterisms or constellations, known as "officials" (Chinese xīng guān).
The CNO cycle (for carbon–nitrogen–oxygen) is one of the two known sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction.
Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.
The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.
Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.
Christmas traditions vary from country to country.
According to traditional Chinese uranography, the modern constellation Cygnus is located within the northern quadrant of the sky, which is symbolized as the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ).
A dredge-up is a period in the evolution of a star where a surface convection zone extends down to the layers where material has undergone nuclear fusion.
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.
Earth mass (where ⊕ is the standard astronomical symbol for planet Earth) is the unit of mass equal to that of Earth.
The Eddington luminosity, also referred to as the Eddington limit, is the maximum luminosity a body (such as a star) can achieve when there is balance between the force of radiation acting outward and the gravitational force acting inward.
The Encampment mansion is one of the Twenty-eight mansions of the Chinese constellations.
Epsilon Cephei, Latinized from ε Cephei, is a star in the northern constellation of Cepheus.
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.
Flying Serpent (Tengshe 螣蛇) is an asterism in the Chinese constellation Encampment (Shixiu 室宿).
The General Catalogue of Variable Stars (GCVS) is a list of variable stars.
HD 206267A is a hierarchical triple star system in the northern circumpolar constellation of Cepheus.
Helium (from lit) is a chemical element with symbol He and atomic number 2.
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.
Iota Andromedae (ι And, ι Andromedae) is a star in the constellation Andromeda.
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
John Flamsteed FRS (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Kappa Andromedae (κ And, κ Andromedae) is the Bayer designation for a bright star in the constellation of Andromeda.
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.
According to traditional Chinese uranography, the modern constellation Lacerta is located within the northern quadrant of the sky, which is symbolized as the Black Tortoise of the North (北方玄武, Běi Fāng Xuán Wǔ).
Lambda Andromedae (λ And, λ Andromedae) is the Bayer designation for a binary star in the northern constellation of Andromeda.
The Milky Way is the galaxy that contains our Solar System.
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.
New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.
In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.
Nitrogen is a chemical element with symbol N and atomic number 7.
Oxygen is a chemical element with symbol O and atomic number 8.
Pi¹ Cygni (π¹ Cygni, abbreviated Pi¹ Cyg, π¹ Cyg) is a binary star in the northern constellation of Cygnus.
Pi2 Cygni, Latinized from π2 Cygni, is a triple star system in the northern constellation of Cygnus.
The Pistol Star is a blue hypergiant star, one of the most luminous known in the Milky Way.
Psi Andromedae (ψ And, ψ Andromedae) is the Bayer designation for a triple star system in the northern constellation of Andromeda.
Red supergiants are stars with a supergiant luminosity class (Yerkes class I) of spectral type K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous.
Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.
Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.
Sigma Cassiopeiae (σ Cas, σ Cassiopeiae) is a binary star in the constellation Cassiopeia.
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
Sodium is a chemical element with symbol Na (from Latin natrium) and atomic number 11.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
The Sun is the star at the center of the Solar System.
Tau Cassiopeiae (τ Cassiopeiae) is a solitary, orange hued star in the northern constellation of Cassiopeia.
The triple-alpha process is a set of nuclear fusion reactions by which three helium-4 nuclei (alpha particles) are transformed into carbon.
The Twenty-Eight Mansions, hsiu, xiu or sieu are part of the Chinese constellations system.
Uranometria is the short title of a star atlas produced by Johann Bayer.
V509 Cassiopeiae (V509 Cas or HR 8752) is one of two yellow hypergiant stars found in the constellation Cassiopeia, which also contains Rho Cassiopeiae.
VY Canis Majoris (VY CMa) is an extreme pulsating red hypergiant (or supergiant) star located in the constellation Canis Major.
The William Herschel Telescope (WHT) is a optical/near-infrared reflecting telescope located at the Observatorio del Roque de los Muchachos on the island of La Palma in the Canary Islands, Spain.
A yellow hypergiant is a massive star with an extended atmosphere, a spectral class from A to K, and an initial mass of about 20–60 solar masses but having lost as much as half that mass.
2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.
2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.
3 Andromedae (abbreviated 3 And) is a star in the constellation Andromeda.
4 Lacertae (4 Lac) is a star in the constellation Lacerta.
7 Andromedae (abbreviated 7 And) is a star in the constellation Andromeda.
8 Andromedae (abbreviated 8 And) is a red giant star in the constellation Andromeda.
9 Lacertae (9 Lac) is a star in the constellation Lacerta.