75 relations: Achilles, Aldebaran, Alfred, Lord Tennyson, Apparent magnitude, Asterism (astronomy), Astronomical unit, Atlas (mythology), Barred spiral galaxy, Bayer designation, Beehive Cluster, Binary star, Brown dwarf, Caldwell catalogue, Charles Messier, Collinder catalog, Constellation, Cosmic distance ladder, Delta Tauri, Earth, Epsilon Tauri, Exoplanet, Galactic Center, Gamma Tauri, Gas giant, Giant star, Giovanni Battista Hodierna, Globular cluster, Greek language, Green Grow the Rushes, O, Henry Draper Catalogue, Hephaestus, Hertzsprung–Russell diagram, Hipparcos, Homer, Hubble Space Telescope, Hyades (mythology), Hyades Stream, Iliad, Iota Horologii, Kappa Tauri, Lewis Boss, Light-year, Mass segregation (astronomy), Messier 67, Metallicity, Milky Way, Monthly Notices of the Royal Astronomical Society, Naked eye, Open cluster, Orion (constellation), ..., Ovid, Philibert Jacques Melotte, Photoevaporation, Pleiades, Pleiades (Greek mythology), Proper motion, Red dwarf, Semi-major and semi-minor axes, Sirius, Solar mass, Star cluster, Stellar classification, Stellar designations and names, Stellar evolution, Stellar parallax, Sun, Taurus (constellation), Theta Tauri, Ulysses (poem), Upsilon Tauri, Ursa Major, Ursa Major Moving Group, White dwarf, 71 Tauri, 90 Tauri. Expand index (25 more) » « Shrink index
In Greek mythology, Achilles or Achilleus (Ἀχιλλεύς, Achilleus) was a Greek hero of the Trojan War and the central character and greatest warrior of Homer's Iliad.
Aldebaran, designated Alpha Tauri (α Tauri, abbreviated Alpha Tau, α Tau), is an orange giant star located about 65 light-years from the Sun in the zodiac constellation of Taurus.
Alfred Tennyson, 1st Baron Tennyson (6 August 1809 – 6 October 1892) was Poet Laureate of Great Britain and Ireland during much of Queen Victoria's reign and remains one of the most popular British poets.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
In observational astronomy, an asterism is a popular known pattern or group of stars that are recognised in the night sky.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
In Greek mythology, Atlas (Ἄτλας, Átlas) was a Titan condemned to hold up the sky for eternity after the Titanomachy.
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.
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.
The Beehive Cluster (also known as Praesepe (Latin for "manger"), M44, NGC 2632, or Cr 189), is an open cluster in the constellation Cancer.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
Brown dwarfs are substellar objects that occupy the mass range between the heaviest gas giant planets and the lightest stars, having masses between approximately 13 to 75–80 times that of Jupiter, or approximately to about.
The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.
Charles Messier (26 June 1730 – 12 April 1817) was a French astronomer most notable for publishing an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 "Messier objects".
In astronomy, the Collinder catalog is a catalog of 471 open clusters by Swedish astronomer Per Collinder.
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.
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.
The Bayer designation Delta Tauri (δ Tau, δ Tauri) is shared by three star systems in the constellation Taurus.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
Epsilon Tauri (ε Tauri, abbreviated Epsilon Tau, ε Tau), also named Ain, is an orange giant star located approximately 45 parsecs (147 light-years) from the Sun in the constellation of Taurus.
An exoplanet or extrasolar planet is a planet outside our solar system.
The Galactic Center is the rotational center of the Milky Way.
Gamma Tauri (γ Tauri, abbreviated Gam Tau, γ Tau) is either a solitary, binary or double star (the Washington Double Star Catalog notes it as a "Dubious Double" or "Bogus Binary") that marks the tip of the "V" in the constellation of Taurus.
A gas giant is a giant planet composed mainly of hydrogen and helium.
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
Giovanni Battista Hodierna, also spelled as Odierna (April 13, 1597 – April 6, 1660) was an Italian astronomer at the court of Giulio Tomasi, Duke of Palma (Palma di Montechiaro).
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.
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.
Green Grow the Rushes, O (alternatively Ho or Oh) (also known as The Twelve Prophets, The Carol of the Twelve Numbers, The Teaching Song, The Dilly Song, or The Ten Commandments), is an English folk song (Roud #133) popular across the English-speaking world.
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.
Hephaestus (eight spellings; Ἥφαιστος Hēphaistos) is the Greek god of blacksmiths, metalworking, carpenters, craftsmen, artisans, sculptors, metallurgy, fire, and volcanoes.
The Hertzsprung–Russell diagram, abbreviated H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
Homer (Ὅμηρος, Hómēros) is the name ascribed by the ancient Greeks to the legendary author of the Iliad and the Odyssey, two epic poems that are the central works of ancient Greek literature.
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
In Greek mythology, the Hyades (Ὑάδες, popularly "the rainy ones" from ὕω hyo "I fall as rain", but probably from ὗς hys "swine") are a sisterhood of nymphs that bring rain.
The Hyades Stream (or Hyades moving group) is a large collection of scattered stars that also share a similar trajectory with the Hyades Cluster.
The Iliad (Ἰλιάς, in Classical Attic; sometimes referred to as the Song of Ilion or Song of Ilium) is an ancient Greek epic poem in dactylic hexameter, traditionally attributed to Homer.
Iota Horologii, Latinized from ι Horologii, is a yellow-hued star approximately 56 light-years away in the Horologium constellation.
Kappa Tauri (κ Tau, κ Tauri) is a double star in the constellation Taurus and a member of the Hyades open cluster.
Lewis Boss (26 October 1846 – 5 October 1912) was an American astronomer.
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
In astronomy, dynamical mass segregation is the process by which heavier members of a gravitationally bound system, such as a star cluster or cluster of galaxies, tend to move toward the center, while lighter members tend to move farther away from the center.
Messier 67 (also known as M67 or NGC 2682) is an open cluster in the constellation of Cancer.
In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.
The Milky Way is the galaxy that contains our Solar System.
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying or light-collecting optical instrument, such as a telescope or microscope.
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.
Orion is a prominent constellation located on the celestial equator and visible throughout the world.
Publius Ovidius Naso (20 March 43 BC – 17/18 AD), known as Ovid in the English-speaking world, was a Roman poet who lived during the reign of Augustus.
Philibert Jacques Melotte (29 January 1880 – 30 March 1961) was a British astronomer whose parents emigrated from Belgium.
Photoevaporation denotes the process where energetic radiation ionises gas and causes it to disperse away from the ionising source.
The Pleiades (also known as the Seven Sisters and Messier 45), are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus.
The Pleiades (Πλειάδες), companions of Artemis, were the seven daughters of the titan Atlas and the sea-nymph Pleione born on Mount Cyllene.
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.
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.
Sirius (a romanization of Greek Σείριος, Seirios,."glowing" or "scorching") is a star system and the brightest star in the Earth's night sky.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
Star clusters are groups of stars.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Designations and names of stars (and other celestial bodies) are currently primarily mediated in the scientific community by the International Astronomical Union (IAU), a de facto authority.
Stellar evolution is the process by which a star changes over the course of time.
Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.
The Sun is the star at the center of the Solar System.
Taurus (Latin for "the Bull") is one of the constellations of the zodiac, which means it is crossed by the plane of the ecliptic.
Theta Tauri (θ Tauri, abbreviated Tet Tau, θ Tau) is a double star in the constellation of Taurus and a member of the Hyades open cluster.
"Ulysses" is a poem in blank verse by the Victorian poet Alfred, Lord Tennyson (1809–1892), written in 1833 and published in 1842 in his well-received second volume of poetry.
Upsilon Tauri (υ Tauri) is a solitary, white-hued star in the zodiac constellation of Taurus, and is a member of the Hyades star cluster.
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
The Ursa Major Moving Group, also known as Collinder 285 and the Ursa Major association, is a nearby stellar moving group – a set of stars with common velocities in space and thought to have a common origin in space and time.
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
71 Tauri (71 Tau) is a faint star in the constellation Taurus.
90 Tauri (90 Tau) is a star in the constellation Taurus.