232 relations: Abell catalogue, Absolute magnitude, Afanasy Fet, Akkadian Empire, Algol variable, Alice Maher, Almagest, Alpha Comae Berenices, Alpha2 Canum Venaticorum variable, American Anthropologist, American Association of Variable Star Observers, An Universal Etymological English Dictionary, Angular diameter, Antinous (constellation), Aphrodite, Apparent magnitude, Ariadne, Arsinoe II, Asterism (astronomy), Astronomy & Astrophysics, Astronomy in the medieval Islamic world, Azure Dragon, Babylonian astronomy, Barred spiral galaxy, Bayer designation, Berenice II of Egypt, Beta Comae Berenices, Binary star, Binary system, BL Lacertae object, Black Eye Galaxy, Black hole, Blazar, Boötes, British Astronomical Association, British Museum, Callimachus, Canes Venatici, Caspar Vopel, Catullus, Celestial globe, Centre de données astronomiques de Strasbourg, Cepheid variable, Charles Messier, Coma Berenices (dwarf galaxy), Coma Berenices in Chinese astronomy, Coma Berenicids, Coma Cluster, Coma Filament, Coma Star Cluster, ..., Coma Supercluster, Conon of Samos, Constellation, Constellation family, Culmination, Dark matter, De Astronomica, Declination, Double star, Dragonfly 44, Dust lane, Dwarf galaxy, Dwarf nova, Elliptical galaxy, Epoch (astronomy), Equatorial coordinate system, Eratosthenes, Eugène Joseph Delporte, European Space Agency, Exoplanet, Extreme ultraviolet, F-type main-sequence star, FK Comae Berenices, Flamsteed designation, Flocculent spiral galaxy, Fritz Zwicky, Gaius Julius Hyginus, Galactic coordinate system, Galactic plane, Galactic quadrant, Galaxy cluster, Galaxy merger, Gamma Comae Berenices, Gamma ray, Gamma-ray burst, Geminus, Gerardus Mercator, Giant star, Globular cluster, Gore (segment), Gravitational lens, GRB 050509B, Gunnar Ekelöf, Hair, HD 108874 b, Hellenistic period, Hipparchus, Hubble Space Telescope, Instituto de Astrofísica de Canarias, Interacting galaxy, International Astronomical Union, Interstellar medium, Isosceles triangle, Johann Bayer, Johann Elert Bode, Johannes Hevelius, Johannes Schöner, John Flamsteed, Kalina people, LacusCurtius, Latin, Lenticular galaxy, Leo (constellation), Leo Cluster, Leonids, Light-year, Low-surface-brightness galaxy, Luis Ricardo Falero, Main sequence, Malin 1, Mersin, Messier 100, Messier 53, Messier 85, Messier 88, Messier 91, Messier 98, Messier 99, Messier object, Meteor shower, Mezzotint, Mice Galaxies, Milky Way, Mira variable, NASA, Nature (journal), Nebula, Neutron star, New Scientist, NGC 4147, NGC 4314, NGC 4394, NGC 4414, NGC 4565, NGC 4651, NGC 4725, NGC 4874, NGC 4889, NGC 4921, NGC 5053, North Pole, Northern celestial hemisphere, Online Etymology Dictionary, Open cluster, Orbital period, Orbital plane (astronomy), Pawnee people, Petrus Apianus, Photometry (astronomy), Planetary nebula, Polynesians, Popular Astronomy (US magazine), Proper motion, Proper names (astronomy), Ptolemy, Ptolemy III Euergetes, Pukapuka, Pulsar, Quasar, Radiant (meteor shower), Ramesside star clocks, Red giant, Redshift, Right ascension, RR Lyrae variable, Satellite galaxy, Science Daily, Semiregular variable star, Sky & Telescope, SN 1940B, SN 1979C, SN 2005ap, SN 2006X, Solar analog, Solar irradiance, Solar mass, Sotheby's, Southern celestial hemisphere, Spiral galaxy, Star catalogue, Star cluster, Star formation, Star system, Starspot, Stellar classification, Stellar kinematics, Sun, Supercluster, Supermassive black hole, Supernova, Supreme Palace enclosure, Syrian Wars, Tanning (leather), The Magnificent Seven (neutron stars), Tonga, Tycho Brahe, Type II supernova, Ulugh Beg, Unbarred spiral galaxy, Universe Today, Uranometria, Ursa Major, Variable star, Virgo (constellation), Virgo Cluster, Votive offering, W. M. Keck Observatory, Wergaia, Wig, William Herschel, X-ray, 12 Comae Berenices, 13 Comae Berenices, 14 Comae Berenices, 16 Comae Berenices, 23 Comae Berenices, 28th parallel south, 7 Comae Berenices, 70th parallel south, 77th parallel south, 88 modern constellations, 88 modern constellations by area. Expand index (182 more) » « Shrink index
The Abell catalog of rich clusters of galaxies is an all-sky catalog of 4,073 rich galaxy clusters of nominal redshift z ≤ 0.2.
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
Afanasy Afanasyevich Fet (a), later known as Shenshin (a); –), was a renowned Russian poet regarded as the finest master of lyric verse in Russian literature.
The Akkadian Empire was the first ancient Semitic-speaking empire of Mesopotamia, centered in the city of Akkad and its surrounding region, also called Akkad in ancient Mesopotamia in the Bible.
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.
Alice Maher (born 1956) born at Kilmoyler, near Bansha, County Tipperary, Ireland, is a noted artist who uses a wide variety of media including sculpture, photography and installation.
The Almagest is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy. One of the most influential scientific texts of all time, its geocentric model was accepted for more than 1200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus.
Alpha Comae Berenices (α Comae Berenices, abbreviated Alf Com, α Com) is a binary star in the constellation of Coma Berenices (Berenice's Hair).
An Alpha2 Canum Venaticorum variable (or α2 CVn variable) is a type of variable star.
American Anthropologist is the flagship journal of the American Anthropological Association (AAA), published quarterly by Wiley.
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.
An Universal Etymological English Dictionary was a dictionary compiled by Nathan Bailey (or Nathaniel Bailey) and first published in London in 1721.
The angular diameter, angular size, apparent diameter, or apparent size is an angular measurement describing how large a sphere or circle appears from a given point of view.
Antinous is an obsolete constellation no longer in use by astronomers, having been merged into Aquila, which it bordered to the North.
Aphrodite is the ancient Greek goddess of love, beauty, pleasure, and procreation.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Ariadne (Ἀριάδνη; Ariadne), in Greek mythology, was the daughter of Minos—the King of Crete and a son of Zeus—and Pasiphaë—Minos' queen and a daughter of Helios.
Arsinoë II (Ἀρσινόη, 316 BC – unknown date between July 270 and 260 BC) was a Ptolemaic Queen and co-regent of Ancient Egypt.
In observational astronomy, an asterism is a popular known pattern or group of stars that are recognised in the night sky.
Astronomy & Astrophysics is a peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries), and mostly written in the Arabic language.
The Azure Dragon (青龍 Qīnglóng), also known as Bluegreen Dragon, Green Dragon, or also called the Blue Dragon (蒼龍 Cānglóng), is one of the Dragon Gods who represent the mount or chthonic forces of the Five Forms of the Highest Deity (五方上帝 Wǔfāng Shàngdì).
The history of astronomy in Mesopotamia, and the world, begins with the Sumerians who developed the earliest writing system—known as cuneiform—around 3500–3200 BC.
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.
Berenice II (267 or 266 BC – 221 BC) was a ruling queen of Cyrene by birth, and a queen and co-regent of Egypt by marriage to her cousin Ptolemy III Euergetes, the third ruler of the Ptolemaic dynasty of Egypt.
Beta Comae Berenices (β Comae Berenices, β Com) is a main sequence dwarf star in the northern constellation of Coma Berenices.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
A binary system is a system of two astronomical bodies which are close enough that their gravitational attraction causes them to orbit each other around a barycenter (also see animated examples).
A BL Lacertae object or BL Lac object is a type of galaxy with an active galactic nucleus (AGN), named after its prototype, BL Lacertae.
The Black Eye Galaxy (also called Evil Eye Galaxy; designated Messier 64, M64, or NGC 4826) is a galaxy which was discovered by Edward Pigott in March 1779, and independently by Johann Elert Bode in April of the same year, as well as by Charles Messier in 1780.
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
A blazar is a very compact quasar (quasi-stellar radio source) associated with a presumed supermassive black hole at the center of an active, giant elliptical galaxy.
Boötes is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere.
The British Astronomical Association (BAA) was formed in 1890 as a national body to support the UK's amateur astronomers.
The British Museum, located in the Bloomsbury area of London, United Kingdom, is a public institution dedicated to human history, art and culture.
Callimachus (Καλλίμαχος, Kallimakhos; 310/305–240 BC) was a native of the Greek colony of Cyrene, Libya.
Canes Venatici is one of the 88 official modern constellations.
Caspar Vopel (1511–1561) was a German cartographer and instrument maker.
Gaius Valerius Catullus (c. 84 – c. 54 BC) was a Latin poet of the late Roman Republic who wrote chiefly in the neoteric style of poetry, which is about personal life rather than classical heroes.
Celestial globes show the apparent positions of the stars in the sky.
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.
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".
Coma Berenices or Com is a dwarf spheroidal galaxy situated in the Coma Berenices constellation and discovered in 2006 in data obtained by the Sloan Digital Sky Survey.
The modern constellation Coma Berenices lies across one of the quadrants symbolized by the Azure Dragon of the East (東方青龍, Dōng Fāng Qīng Lóng), and Three Enclosures (三垣, Sān Yuán), that divide the sky in traditional Chinese uranography.
Comae Berenicids (IMO designation: COM; IAU shower number: 20) is a minor meteor shower with a radiant in the constellation Coma Berenices.
The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies.
Coma Filament is a galaxy filament.
The Coma Star Cluster in Coma Berenices, designated Melotte 111 after its entry in the catalogue of star clusters by P. J. Melotte, is a small but nearby star cluster in our galaxy, containing about 40 brighter stars (magnitude 5 to 10) with a common proper motion.
The Coma Supercluster (SCl 117) is a nearby supercluster of galaxies comprising the Coma Cluster (Abell 1656) and the Leo Cluster (Abell 1367).
Conon of Samos (Κόνων ὁ Σάμιος, Konōn ho Samios; c. 280 – c. 220 BCE) was a Greek astronomer and mathematician.
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.
Constellation families are collections of constellations sharing some defining characteristic, such as proximity on the celestial sphere, common historical origin, or common mythological theme.
In astronomy, the culmination of a planet, star, or constellation is its transit over an observer's meridian.
Dark matter is a theorized form of matter that is thought to account for approximately 80% of the matter in the universe, and about a quarter of its total energy density.
De Astronomica, also known as Poeticon Astronomicon, is a book of stories whose text is attributed to "Hyginus", though the true authorship is disputed.
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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.
Dragonfly 44 is an ultra diffuse galaxy in the Coma Cluster.
A dust lane is a relatively dense obscuring band of interstellar dust, observed as a dark swath against the background of a brighter object, especially a galaxy.
A dwarf galaxy is a small galaxy composed of about 100 million up to several billion stars, a small number compared to the Milky Way's 200–400 billion stars.
A U Geminorum-type variable star, or dwarf nova (pl. novae) is a type of cataclysmic variable star consisting of a close binary star system in which one of the components is a white dwarf that accretes matter from its companion.
An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless image.
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.
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
Eratosthenes of Cyrene (Ἐρατοσθένης ὁ Κυρηναῖος,; –) was a Greek mathematician, geographer, poet, astronomer, and music theorist.
Eugène Joseph Delporte (10 January 1882 – 19 October 1955) was a Belgian astronomer born in Genappe.
The European Space Agency (ESA; Agence spatiale européenne, ASE; Europäische Weltraumorganisation) is an intergovernmental organisation of 22 member states dedicated to the exploration of space.
An exoplanet or extrasolar planet is a planet outside our solar system.
Extreme ultraviolet radiation (EUV or XUV) or high-energy ultraviolet radiation is electromagnetic radiation in the part of the electromagnetic spectrum spanning wavelengths from 124 nm down to 10 nm, and therefore (by the Planck–Einstein equation) having photons with energies from 10 eV up to 124 eV (corresponding to 124 nm to 10 nm respectively).
An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K.Tables VII and VIII.
FK Comae Berenices is a variable star that varies in apparent magnitude between 8.14m and 8.33m over a period of 2.4 days.
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.
A flocculent spiral galaxy is a type of spiral galaxy.
Fritz Zwicky (February 14, 1898 – February 8, 1974) was a Swiss astronomer.
Gaius Julius Hyginus (64 BC – AD 17) was a Latin author, a pupil of the famous Cornelius Alexander Polyhistor, and a freedman of Caesar Augustus.
The galactic coordinate system is a celestial coordinate system in spherical coordinates, with the Sun as its center, the primary direction aligned with the approximate center of the Milky Way galaxy, and the fundamental plane parallel to an approximation of the galactic plane but offset to its north.
The galactic plane is the plane on which the majority of a disk-shaped galaxy's mass lies.
A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy.
A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.
Galaxy mergers can occur when two (or more) galaxies collide.
Gamma Comae Berenices, Latinized from γ Comae Berenices, is a single, orange-hued star in the southern constellation of Coma Berenices.
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
In gamma-ray astronomy, gamma-ray bursts (GRBs) are extremely energetic explosions that have been observed in distant galaxies.
Geminus of Rhodes (Γεμῖνος ὁ Ῥόδιος), was a Greek astronomer and mathematician, who flourished in the 1st century BC.
Gerardus Mercator (5 March 1512 – 2 December 1594) was a 16th-century German-Flemish cartographer, geographer and cosmographer.
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.
A gore is a sector of a curved surface or the curved surface that lies between two close lines of longitude on a globe and may be flattened to a plane surface with little distortion.
A gravitational lens is a distribution of matter (such as a cluster of galaxies) between a distant light source and an observer, that is capable of bending the light from the source as the light travels towards the observer.
GRB 050509B was a gamma ray burst (GRB) observed by the NASA Swift satellite on May 9, 2005.
Bengt Gunnar Ekelöf (15 September 1907, Stockholm – 16 March 1968, Sigtuna) was a Swedish poet and writer.
Hair is a protein filament that grows from follicles found in the dermis.
HD 108874 b is a gas giant announced in 2003.
The Hellenistic period covers the period of Mediterranean history between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire as signified by the Battle of Actium in 31 BC and the subsequent conquest of Ptolemaic Egypt the following year.
Hipparchus of Nicaea (Ἵππαρχος, Hipparkhos) was a Greek astronomer, geographer, and mathematician.
The Hubble Space Telescope (HST) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation.
The Instituto de Astrofísica de Canarias (IAC) is an astrophysical research institute located in the Canary Islands.
Interacting galaxies (colliding galaxies) are galaxies whose gravitational fields result in a disturbance of one another.
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.
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
In geometry, an isosceles triangle is a triangle that has two sides of equal length.
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
Johann Elert Bode (19 January 1747 – 23 November 1826) was a German astronomer known for his reformulation and popularisation of the Titius–Bode law.
Johannes Hevelius Some sources refer to Hevelius as Polish.
Johannes Schöner (16 January 1477 in Karlstadt am Main – 16 January 1547 in Nürnberg) (aka, Johann Schönner, Johann Schoener, Jean Schönner, Joan Schoenerus) was a renowned and respected German polymath.
John Flamsteed FRS (19 August 1646 – 31 December 1719) was an English astronomer and the first Astronomer Royal.
The Kalina, also known as the Caribs, Kali'na, mainland Caribs and several other names, are an indigenous people native to the northern coastal areas of South America.
LacusCurtius is a website specializing in ancient Rome, currently hosted on a server at the University of Chicago.
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes.
Leo is one of the constellations of the zodiac, lying between Cancer the crab to the west and Virgo the maiden to the east.
The Leo Cluster (Abell 1367) is a galaxy cluster about 330 million light-years distant (z.
The Leonids are a prolific meteor shower associated with the comet Tempel–Tuttle.
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.
A low-surface-brightness galaxy, or LSB galaxy, is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.
Luis Ricardo Falero (1851 – December 7, 1896), Duke of Labranzano, was a Spanish painter.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
Malin 1 is a giant low surface brightness (LSB) spiral galaxy.
Mersin is a large city and a port on the Mediterranean coast of southern Turkey.
Messier 100 (also known as NGC 4321) is an example of a grand design intermediate spiral galaxy located within the southern part of constellation Coma Berenices.
Messier 53 (also known as M53 or NGC 5024) is a globular cluster in the Coma Berenices constellation.
Messier 85 (also known as M85 or NGC 4382 or PGC 40515 or ISD 0135852) is a lenticular galaxy, or elliptical galaxy for other authors, in the Coma Berenices constellation.
Messier 88 (also known as M88 or NGC 4501) is a spiral galaxy about 50 to 60 million light-years away in the constellation Coma Berenices.
Messier 91 (also known as NGC 4548 or M91) is a barred spiral galaxy located in the Coma Berenices constellation and is part of the Virgo Cluster of galaxies.
Messier 98, also known as M98 or NGC 4192, is an intermediate spiral galaxy located about 44.4 million light-years away in the constellation Coma Berenices, about 6° to the east of the bright star Denebola.
Messier 99 or M99 (NGC 4254) in the constellation Coma Berenices is an unbarred spiral galaxy approximately 15 megaparsecs (56 million light-years) in distance from the Milky Way.
The Messier objects are a set of 110 astronomical objects, of which 103 were included in lists published by French astronomer Charles Messier in 1771 and 1781.
A meteor shower is a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky.
Mezzotint is a printmaking process of the intaglio family, technically a drypoint method.
NGC 4676, or the Mice Galaxies, are two spiral galaxies in the constellation Coma Berenices.
The Milky Way is the galaxy that contains our Solar System.
Mira variables ("Mira", Latin, adj. - feminine form of adjective "wonderful"), named for the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.
A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
New Scientist, first published on 22 November 1956, is a weekly, English-language magazine that covers all aspects of science and technology.
NGC 4147 is the New General Catalogue identifier for a globular cluster of stars in the northern constellation of Coma Berenices.
NGC 4314 is a barred spiral galaxy approximately 40 million light-years away in the constellation Coma Berenices.
NGC 4394 is a SBb barred spiral galaxy in the constellation Coma Berenices and is situated about 39.5 million light-years (12.1 megaparsecs) from Earth.
NGC 4414 is an unbarred spiral galaxy about 62 million light-years away in the constellation Coma Berenices.
NGC 4565 (also known as the Needle Galaxy or Caldwell 38) is an edge-on spiral galaxy about 30 to 50 million light-years away in the constellation Coma Berenices.
NGC 4651 is a spiral galaxy located in the constellation of Coma Berenices that can be seen with amateur telescopes, at a distance not well determined that ranges from 35 million light years to 72 million light years.
NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure about 40 million light-years away in the constellation Coma Berenices.
NGC 4874 (Coma A) is a giant elliptical galaxy.
NGC 4889 (also known as Coma B) is an E4 supergiant elliptical galaxy.
NGC 4921 is a barred spiral galaxy in the Coma Cluster, located in the constellation Coma Berenices.
NGC 5053 is the New General Catalogue designation for a globular cluster in the northern constellation of Coma Berenices.
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
The Northern Celestial Hemisphere, or the Northern Sky, is the northern half of the celestial sphere; that is, it lies north of the celestial equator.
The Online Etymology Dictionary is a free online dictionary written and compiled by Douglas Harper that describes the origins of English-language words.
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.
The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
The orbital plane of a revolving body is the geometric plane on which its orbit lies.
The Pawnee are a Plains Indian tribe who are headquartered in Pawnee, Oklahoma.
Petrus Apianus (April 16, 1495 – April 21, 1552), also known as Peter Apian, Peter Bennewitz, and Peter Bienewitz was a German humanist, known for his works in mathematics, astronomy and cartography.
Photometry is a technique of astronomy concerned with measuring the flux, or intensity of an astronomical object's electromagnetic radiation.
A planetary nebula, abbreviated as PN or plural PNe, is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
The Polynesians are a subset of Austronesians native to the islands of Polynesia that speak the Polynesian languages, a branch of the Oceanic subfamily of the Austronesian language family.
Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.
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.
Some astronomical objects have proper names (common names, popular names, traditional names); as opposed to catalogue numbers or other systematic designations.
Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.
Ptolemy III Euergetes (Πτολεμαῖος Εὐεργέτης, Ptolemaĩos Euergétēs "Ptolemy the Benefactor"; 284–222 BC) was the third king of the Ptolemaic dynasty in Egypt from 246 to 222 BCE.
Pukapuka is a coral atoll in the northern group of the Cook Islands in the Pacific Ocean.
A pulsar (from pulse and -ar as in quasar) is a highly magnetized rotating neutron star or white dwarf that emits a beam of electromagnetic radiation.
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
The radiant or apparent radiant of a meteor shower is the point in the sky from which (to a planetary observer) meteors appear to originate.
The Ramesside star clocks are ancient Egyptian star clocks appearing on the ceilings of several royal tombs of the Ramesside period.
A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
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.
RR Lyrae variables are periodic variable stars, commonly found in globular clusters.
A satellite galaxy is a smaller companion galaxy that travels on bound orbits within the gravitational potential of a more massive and luminous host galaxy (also known as the primary galaxy).
Science Daily is an American website that aggregates press releases and publishes lightly edited press releases (a practice called churnalism) about science, similar to Phys.org and EurekAlert!.
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.
Sky & Telescope (S&T) is a monthly American magazine covering all aspects of amateur astronomy, including the following.
SN 1940B was a supernova discovered on 5 May 1940 in the galaxy NGC 4725 in Coma Berenices.
SN 1979C was a supernova about 50 million light-years away in Messier 100, a spiral galaxy in the constellation Coma Berenices.
SN 2005ap was an extremely energetic type Ic supernova in the galaxy SDSS J130115.12+274327.5.
SN 2006X was a Type Ia supernova about 65 million light-years away in Messier 100, a spiral galaxy in the constellation Coma Berenices.
Solar-type star, solar analogs (also analogues), and solar twins are stars that are particularly similar to the Sun.
Solar irradiance is the power per unit area received from the Sun in the form of electromagnetic radiation in the wavelength range of the measuring instrument.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
Sotheby's is a British founded, American multinational corporation headquartered in New York City.
The Southern Celestial Hemisphere, or the Southern Sky, is the southern half of the celestial sphere, which appears to rotate around a polar axis due to Earth's rotation.
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, form part of the Hubble sequence.
A star catalogue (Commonwealth English) or star catalog (American English), is an astronomical catalogue that lists stars.
Star clusters are groups of stars.
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.
Starspots are stellar phenomena.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
In astronomy, stellar kinematics is the observational study or measurement of the kinematics or motions of stars through space.
The Sun is the star at the center of the Solar System.
A supercluster is a large group of smaller galaxy clusters or galaxy groups; it is among the largest-known structures of the cosmos.
A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.
A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.
Tai Wei Yuan, the Supreme Palace Enclosure (太微垣), is one of the San Yuan or Three enclosures.
The Syrian Wars were a series of six wars between the Seleucid Empire and the Ptolemaic Kingdom of Egypt, successor states to Alexander the Great's empire, during the 3rd and 2nd centuries BC over the region then called Coele-Syria, one of the few avenues into Egypt.
Tanned leather in Marrakesh Tanning is the process of treating skins and hides of animals to produce leather.
The Magnificent Seven is the informal name of a group of isolated young cooling neutron stars at a distance of 120 to 500 parsecs from Earth.
Tonga (Tongan: Puleʻanga Fakatuʻi ʻo Tonga), officially the Kingdom of Tonga, is a Polynesian sovereign state and archipelago comprising 169 islands, of which 36 are inhabited.
Tycho Brahe (born Tyge Ottesen Brahe;. He adopted the Latinized form "Tycho Brahe" (sometimes written Tÿcho) at around age fifteen. The name Tycho comes from Tyche (Τύχη, meaning "luck" in Greek, Roman equivalent: Fortuna), a tutelary deity of fortune and prosperity of ancient Greek city cults. He is now generally referred to as "Tycho," as was common in Scandinavia in his time, rather than by his surname "Brahe" (a spurious appellative form of his name, Tycho de Brahe, only appears much later). 14 December 154624 October 1601) was a Danish nobleman, astronomer, and writer known for his accurate and comprehensive astronomical and planetary observations.
A Type II supernova (plural: supernovae or supernovas) results from the rapid collapse and violent explosion of a massive star.
Mīrzā Muhammad Tāraghay bin Shāhrukh (میرزا محمد طارق بن شاہ رخ, میرزا محمد تراغای بن شاہ رخ), better known as Ulugh Beg (March 22, 1394 in Sultaniyeh, Persia – October 27, 1449, Samarkand), was a Timurid ruler as well as an astronomer, mathematician and sultan.
An unbarred spiral galaxy is a type of spiral galaxy without a central bar, or one that is not a barred spiral galaxy.
Universe Today (UT) is a popular North American-based non-commercial space and astronomy news website.
Uranometria is the short title of a star atlas produced by Johann Bayer.
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
Virgo is one of the constellations of the zodiac.
The Virgo Cluster is a cluster of galaxies whose center is 53.8 ± 0.3 Mly (16.5 ± 0.1 Mpc) away in the constellation Virgo.
A votive deposit or votive offering is one or more objects displayed or deposited, without the intention of recovery or use, in a sacred place for broadly religious purposes.
The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.
Wergaia or Werrigia is an indigenous Australian language group in the Wimmera region of north-Western Victoria.
A wig is a head covering made from human hair, animal hair, or synthetic fiber.
Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.
X-rays make up X-radiation, a form of electromagnetic radiation.
12 Comae Berenices (12 Com) is a spectroscopic binary in the constellation Coma Berenices.
13 Comae Berenices is a probable binary star system in the northern constellation of Coma Berenices.
14 Comae Berenices (14 Com) is a star in the constellation Coma Berenices.
16 Comae Berenices (16 Com) is a star in the constellation Coma Berenices.
23 Comae Berenices (23 Com) is a binary star in the constellation Coma Berenices.
The 28th parallel south is a circle of latitude that is 28 degrees south of the Earth's equatorial plane.
7 Comae Berenices (7 Com) is a star in the constellation Coma Berenices.
The 70th parallel south is a circle of latitude that is 70 degrees south of the Earth's equatorial plane in the Antarctic.
The 77th parallel south is a circle of latitude that is 77 degrees south of the Earth's equatorial plane in the Antarctic.
In modern astronomy, the sky (celestial sphere) is divided into 88 regions called constellations, generally based on the asterisms (which are also called "constellations") of Greek and Roman mythology.
The table below ranks the 88 modern constellations by the solid angle that they subtend in the sky, measured in square degrees and millisteradians.