20 relations: Alfred Harrison Joy, Algol variable, American Association of Variable Star Observers, Antlia, Binary star, Bright Star Catalogue, Common envelope, Durchmusterung, Earth, Edward Charles Pickering, Effective temperature, Henry Draper Catalogue, Hipparcos, Luminosity, Minute and second of arc, Parallax, Smithsonian Astrophysical Observatory Star Catalog, Stellar classification, W Ursae Majoris, W Ursae Majoris variable.
Alfred Harrison Joy (September 23, 1882, Greenville, Illinois – April 18, 1973, Pasadena, California) was an astronomer best known for his work on stellar distances, the radial motion of stars, and variable stars.
Algol variables or Algol-type binaries are a class of eclipsing binary stars that are related to the prototype member of this class, β Persei (Beta Persei, Algol) from an evolutionary point of view.
Since its founding in 1911, the American Association of Variable Star Observers (AAVSO) has coordinated, collected, evaluated, analyzed, published, and archived variable star observations made largely by amateur astronomers and makes the records available to professional astronomers, researchers, and educators.
Antlia (from Ancient Greek ἀντλία) is a constellation in the Southern Celestial Hemisphere.
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.
In astronomy, a common envelope (CE) is gas that contains a binary star system.
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 is the third planet from the Sun and the only astronomical object known to harbor life.
Prof Edward Charles Pickering FRS(For) HFRSE (July 19, 1846 – February 3, 1919) was an American astronomer and physicist and the older brother to William Henry Pickering.
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.
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.
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
W Ursae Majoris (W UMa) is the variable star designation for a binary star system in the northern constellation of Ursa Major.
A W Ursae Majoris variable, also known as a low mass contact binary, is a type of eclipsing binary variable star.