94 relations: Achernar, Apparent magnitude, Athens, Auriga (constellation), Barred spiral galaxy, Beta Eridani, Caelum, Canes Venatici, Cetus, Chinese astronomy, CMB cold spot, Constellation, Constellation family, Cosmic microwave background, Crater-class cargo ship, Dakshinamurthy, Epsilon Eridani, Eridanos (Athens), Eridanos (river of Hades), Eridanus in Chinese astronomy, Eridu, Exoplanet, Fornax, Frederick Ahl, Galaxy, Ganges, Giant Void, Grand design spiral galaxy, Halo (franchise), Helios, Hindu, Homestuck, Horologium (constellation), Hydrus, IC 2118, Indian astronomy, Johann Bayer, Jupiter, Jupiter mass, LacusCurtius, Latin, Lepus (constellation), Light-year, List of brightest stars, Main sequence, Multiverse, Nataraja, National Radio Astronomy Observatory, New York City, NGC 1232, ..., NGC 1234, NGC 1291, NGC 1300, NGC 1535, Nile, Oort cloud, Orion (constellation), P Eridani, Phaethon, Phoenix (constellation), Po (river), Ptolemy, Quantum entanglement, Radio galaxy, Red dwarf, Reflection nebula, Rigel, River, Sanskrit, Shiva, South Pole, Southern celestial hemisphere, Star, Star Trek, Supergiant star, Taurus (constellation), Theta Eridani, Tucana, United States, United States Navy, Universe, Uranometria, USS Eridanus (AK-92), Very Large Array, Void (astronomy), Vulcan (Star Trek), White dwarf, White Tiger (China), Xu Guangqi, 32nd parallel north, 39 Eridani, 40 Eridani, 88 modern constellations, 88 modern constellations by area. Expand index (44 more) » « Shrink index
Achernar is the name of the primary (or 'A') component of the binary system designated Alpha Eridani (α Eridani, abbreviated Alf Eri, α Eri), which is the brightest 'star' or point of light in, and lying at the southern tip of, the constellation of Eridanus, and the tenth-brightest in the night sky.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Athens (Αθήνα, Athína; Ἀθῆναι, Athênai) is the capital and largest city of Greece.
Auriga is one of the 88 modern constellations; it was among the 48 constellations listed by the 2nd-century astronomer Ptolemy.
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.
Beta Eridani (β Eridani, abbreviated Beta Eri, β Eri), also named Cursa, is the second-brightest star in the constellation of Eridanus, located in the northeast end of this constellation near the shared border with Orion.
Caelum is a faint constellation in the southern sky, introduced in the 1750s by Nicolas Louis de Lacaille and counted among the 88 modern constellations.
Canes Venatici is one of the 88 official modern constellations.
Cetus is a constellation.
Astronomy in China has a long history, beginning from the Shang Dynasty (Chinese Bronze Age).
The CMB Cold Spot or WMAP Cold Spot is a region of the sky seen in microwaves that has been found to be unusually large and cold relative to the expected properties of the cosmic microwave background radiation (CMBR).
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.
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
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.
Dakshinamurthy दक्षिणामूर्ति is an aspect of the Hindu god Shiva as a guru (teacher) of all types of knowledge.
Epsilon Eridani (ε Eridani, abbreviated Epsilon Eri, ε Eri), also named Ran, is a star in the southern constellation of Eridanus, at a declination of 9.46° south of the celestial equator.
Eridanos was the small stream that flowed from a source in the foothills of the Lykabettos, through the Agora of ancient Athens in Greece to the archaeological site of the Kerameikos, where its bed is still visible.
The river Eridanos or Eridanus (Ἠριδανός, "Amber") is a river in northern Europe mentioned in Greek mythology and historiography.
The modern constellation Eridanus lies across one of the quadrants symbolized by the White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ), and The Southern Asterisms (近南極星區, Jìnnánjíxīngōu), that divide the sky in traditional Chinese uranography.
Eridu (Sumerian:, NUN.KI/eridugki; Akkadian: irîtu; modern Arabic: Tell Abu Shahrain) is an archaeological site in southern Mesopotamia (modern Dhi Qar Governorate, Iraq).
An exoplanet or extrasolar planet is a planet outside our solar system.
Fornax is a constellation in the southern sky, partly ringed by the celestial river Eridanus.
Frederick M. Ahl (born 1941) is a professor of classics and comparative literature at Cornell University.
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
The Ganges, also known as Ganga, is a trans-boundary river of Asia which flows through the nations of India and Bangladesh.
The Giant Void (also known as the Giant Void in NGH, Canes Venatici Supervoid, and AR-Lp 36) is an extremely large region of space of underdensity of galaxies within the constellation Canes Venatici.
A grand design spiral galaxy is a type of spiral galaxy with prominent and well-defined spiral arms, as opposed to multi-arm and flocculent spirals which have subtler structural features.
Halo is a military science fiction first-person shooter video game franchise created by Bungie and now managed and developed by 343 Industries, a subsidiary of Microsoft Studios.
Helios (Ἥλιος Hēlios; Latinized as Helius; Ἠέλιος in Homeric Greek) is the god and personification of the Sun in Greek mythology.
Hindu refers to any person who regards themselves as culturally, ethnically, or religiously adhering to aspects of Hinduism.
Homestuck is a webcomic written, illustrated, and animated by American author and artist Andrew Hussie, and is the fourth overall webcomic published on ''MS Paint Adventures'' (MSPA).
Horologium is a faint constellation in the southern sky.
Hydrus is a small constellation in the deep southern sky.
IC 2118 (also known as Witch Head Nebula due to its shape) is an extremely faint reflection nebula believed to be an ancient supernova remnant or gas cloud illuminated by nearby supergiant star Rigel in Orion.
Indian astronomy has a long history stretching from pre-historic to modern times.
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Jupiter mass, also called Jovian mass is the unit of mass equal to the total mass of the planet Jupiter.
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.
Lepus is a constellation lying just south of the celestial equator.
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.
This is a list of the brightest naked eye stars to +2.50 magnitude, as determined by their maximum, total, or combined apparent visual magnitudes as seen from Earth.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
The multiverse (or meta-universe) is a hypothetical group of multiple separate universes including the universe in which humans live.
Nataraja (meaning "the lord of dance") is a depiction of the Hindu god Shiva as the cosmic ecstatic dancer.
The National Radio Astronomy Observatory (NRAO) is a Federally Funded Research and Development Center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc for the purpose of radio astronomy.
The City of New York, often called New York City (NYC) or simply New York, is the most populous city in the United States.
NGC 1232 is an intermediate spiral galaxy about 60 million light-years away in the constellation Eridanus.
NGC 1234 is a peculiar barred spiral galaxy exhibiting a ring structure in the constellation Eridanus, discovered by Francis Preserved Leavenworth in 1886.
NGC 1291, also known as NGC 1269, is a ring galaxy with an unusual inner bar and outer ring structure located about 33 million light-years away in the constellation Eridanus.
NGC 1300 is a barred spiral galaxy about 61 million light-years away in the constellation Eridanus.
NGC 1535 is a planetary nebula in the constellation of Eridanus, discovered by William Herschel on February 1, 1785.
The Nile River (النيل, Egyptian Arabic en-Nīl, Standard Arabic an-Nīl; ⲫⲓⲁⲣⲱ, P(h)iaro; Ancient Egyptian: Ḥ'pī and Jtrw; Biblical Hebrew:, Ha-Ye'or or, Ha-Shiḥor) is a major north-flowing river in northeastern Africa, and is commonly regarded as the longest river in the world, though some sources cite the Amazon River as the longest.
The Oort cloud, named after the Dutch astronomer Jan Oort, sometimes called the Öpik–Oort cloud, is a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from.
Orion is a prominent constellation located on the celestial equator and visible throughout the world.
p Eridani (6 Eri, DUN 5) is a binary star system in the constellation of Eridanus (the River) whose distance is approximately 26 light-years.
In Greek mythology, Phaethon (Φαέθων, Phaéthōn), was the son of the Oceanid Clymene and the solar deity Helios.
Phoenix is a minor constellation in the southern sky.
The Po (Padus and Eridanus; Po; ancient Ligurian: Bodincus or Bodencus; Πάδος, Ἠριδανός) is a river that flows eastward across northern Italy.
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.
Quantum entanglement is a physical phenomenon which occurs when pairs or groups of particles are generated, interact, or share spatial proximity in ways such that the quantum state of each particle cannot be described independently of the state of the other(s), even when the particles are separated by a large distance—instead, a quantum state must be described for the system as a whole.
Radio galaxies and their relatives, radio-loud quasars and blazars, are types of active galaxy that are very luminous at radio wavelengths, with luminosities up to 1039 W between 10 MHz and 100 GHz.
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
In astronomy, reflection nebulae are clouds of interstellar dust which might reflect the light of a nearby star or stars.
Rigel, also designated Beta Orionis (β Orionis, abbreviated Beta Ori, β Ori), is generally the seventh-brightest star in the night sky and the brightest star in the constellation of Orion—though periodically it is outshone within the constellation by the variable Betelgeuse.
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river.
Sanskrit is the primary liturgical language of Hinduism; a philosophical language of Hinduism, Sikhism, Buddhism and Jainism; and a former literary language and lingua franca for the educated of ancient and medieval India.
Shiva (Sanskrit: शिव, IAST: Śiva, lit. the auspicious one) is one of the principal deities of Hinduism.
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface.
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.
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
Star Trek is an American media franchise based on the science fiction television series created by Gene Roddenberry.
Supergiants are among the most massive and most luminous stars.
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 Eridani (θ Eridani, abbreviated Theta Eri, θ Eri) is a binary system in the constellation of Eridanus.
Tucana is a constellation of stars in the southern sky, named after the toucan, a South American bird.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
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 Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
Uranometria is the short title of a star atlas produced by Johann Bayer.
USS Eridanus (AK-92) was an commissioned by the US Navy for service in World War II and manned by a US Coast Guard crew.
The Karl G. Jansky Very Large Array (VLA) is a centimeter-wavelength radio astronomy observatory located in central New Mexico on the Plains of San Agustin, between the towns of Magdalena and Datil, ~50 miles (80 km) west of Socorro.
Cosmic voids are vast spaces between filaments (the largest-scale structures in the universe), which contain very few or no galaxies.
Vulcans (also Vulcanians) are a fictional extraterrestrial humanoid species in the Star Trek franchise who originate from the planet Vulcan.
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.
The White Tiger is one of the Four Symbols of the Chinese constellations.
Xu Guangqi or Hsü Kuang-ch'i (April 24, 1562– November 8, 1633), also known by his baptismal name Paul, was a Chinese scholar-bureaucrat, Catholic convert, agricultural scientist, astronomer, and mathematician under the Ming dynasty.
The 32nd parallel north is a circle of latitude that is 32 degrees north of the Earth's equatorial plane.
39 Eridani (39 Eri) is a star in the constellation Eridanus.
40 Eridani (abbreviated 40 Eri), also designated Omicron² Eridani (ο² Eridani, abbreviated Omicron² Eri, ο² Eri), is a triple star system in the constellation of Eridanus.
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.