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226 relations: Allen Telescope Array, Andromeda (constellation), Andromeda (TV series), Andromeda Galaxy, Andromeda I, Andromeda II, Andromeda III, Andromeda IV, Andromeda V, Andromeda XIX, Andromeda XVIII, Andromeda XXI, Andromeda XXII, Andromeda–Milky Way collision, Antlia, Antlia Cluster, Antlia Dwarf, Aquarius Dwarf, Araucaria Project, Astronomical spectroscopy, Astronomy, Astrophysical maser, Blueshift, Canis Major Overdensity, Cassiopeia (constellation), Cassiopeia Dwarf, Centaurus A, Centaurus A/M83 Group, Cepheid variable, Cetus Dwarf, Circinus Galaxy, Contact (1997 American film), Cosmic age problem, Cosmic infrared background, Cosmic microwave background, Cosmological constant, Cosmos: A Personal Voyage, Crater 2 Dwarf Galaxy, Creationist cosmologies, Dark energy, Dark globular cluster, Dark matter, David Dunlap Observatory Catalogue, DDO 190, De Sitter universe, Detailed logarithmic timeline, Dipole repeller, Dorado Group, Draco Dwarf, Dwarf elliptical galaxy, ..., Dwarf galaxy, Dwarf galaxy problem, Dwarf spheroidal galaxy, Dwingeloo 2, Earth, Eridanus II, Eva Grebel, Expansion of the universe, Extinction (astronomy), Extragalactic astronomy, Formation and evolution of the Solar System, Fornax, Franz Daniel Kahn, Future of an expanding universe, Galactic year, Galaxies in fiction, Galaxy, Galaxy filament, Galaxy formation and evolution, Galaxy group, Galaxy groups and clusters, Globular cluster, Gould Belt, GR 8, H II region, High-velocity cloud, HVC 127-41-330, IC 10, IC 1613, IC 342, IC 342/Maffei Group, IC 5152, Interstellar cloud, KBC Void, KKh 060, KKR 25, KKs 3, Laniakea Supercluster, Large Magellanic Cloud, LEDA 74886, Leo A, Leo I (dwarf galaxy), Leo II (dwarf galaxy), Leo T (dwarf galaxy), Leuschner Observatory, LIGO, List of Andromeda's satellite galaxies, List of galaxies, List of galaxy groups and clusters, List of largest cosmic structures, List of most massive black holes, List of nearest galaxies, List of star-forming regions in the Local Group, List of stars in Andromeda, List of stellar streams, List of supernovae, List of Triangulum's suspected satellite galaxies, List of voids, Local Bubble, Local group, Local Interstellar Cloud, Local Sheet, Local Void, Locality (astronomy), Location of Earth, Luminosity function (astronomy), M81 Group, M94 Group, M96 Group, Maffei 1, Maffei 2, Magellanic Clouds, Marvel Universe, Mayall II, MB 3, Messier 81, Messier 87, MGC1, Milky Way, Multiwavelength Atlas of Galaxies, Mythology of Stargate, NGC 1023 Group, NGC 1049, NGC 147, NGC 1560, NGC 185, NGC 206, NGC 2403, NGC 2500, NGC 2775, NGC 2915, NGC 2997 Group, NGC 300, NGC 3109, NGC 404, NGC 4178, NGC 4244, NGC 4449, NGC 55, NGC 604, NGC 6822, NGC 6946, Noah Brosch, Norma (constellation), Omega Centauri, Open cluster, Orders of magnitude (length), Orders of magnitude (mass), Orders of magnitude (numbers), Orders of magnitude (volume), Orion Arm, Outer space, Outline of Earth, Outline of galaxies, Palomar 12, Patricia Whitelock, Paul W. Hodge, Pegasus Dwarf Irregular Galaxy, Pegasus Dwarf Spheroidal Galaxy, Perry Rhodan, Pisces Dwarf, Pisces–Cetus Supercluster Complex, Proper motion, R. Jay GaBany, Redshift, Redshift quantization, Reticulum II, RR Lyrae variable, Sagittarius Dwarf Irregular Galaxy, Satellite galaxies of the Milky Way, Satellite galaxy, Schild's Ladder, Sculptor (constellation), Sculptor Dwarf Galaxy, Sculptor Dwarf Irregular Galaxy, Sculptor Group, Sextans, Sextans A, Sextans B, Shapley Supercluster, Small Magellanic Cloud, Star, Star Fleet Universe, Starburst region, Starry Night (planetarium software), Super race, Supercluster, Supergalaxy, Supermassive black hole, Systems Commonwealth, TAMA 300, Tarantula Nebula, The World We Live In (Life magazine), Timeline of the far future, Tip of the red-giant branch, Triangulum, Triangulum Galaxy, Tucana, Tucana Dwarf, Type II Cepheid, UGC 4879, UGCA 86, Universe, Ursa Major, Vacuum, Variable star, Velocity dispersion, Virgo Cluster, Virgo Stellar Stream, Virgo Supercluster, Virgocentric flow, Westerhout 5, Wolf–Lundmark–Melotte, Wolf–Rayet star, Wormholes in fiction, Zero-velocity surface. Expand index (176 more) »
Allen Telescope Array
The Allen Telescope Array (ATA), formerly known as the One Hectare Telescope (1hT), is a radio telescope array dedicated to astronomical observations and a simultaneous search for extraterrestrial intelligence (SETI).
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Andromeda (constellation)
Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy and remains one of the 88 modern constellations.
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Andromeda (TV series)
Andromeda (formally titled Gene Roddenberry's Andromeda) is a Canadian/American science fiction television series, based on unused material by Gene Roddenberry, developed by Robert Hewitt Wolfe, and produced by Roddenberry's widow, Majel Barrett.
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Andromeda Galaxy
The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way.
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Andromeda I
Andromeda I is a dwarf spheroidal galaxy(dSph) about 2.40 million light-years away in the constellation Andromeda.
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Andromeda II
Andromeda II (And II) is a dwarf spheroidal galaxy about 2.22 Mly away in the constellation Andromeda.
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Andromeda III
Andromeda III is a dwarf spheroidal galaxy about 2.44 million light-years away in the constellation Andromeda.
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Andromeda IV
Andromeda IV (And IV) is an isolated irregular dwarf galaxy.
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Andromeda V
Andromeda V is a dwarf spheroidal galaxy about 2.52 Mly away in the constellation Andromeda.
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Andromeda XIX
Andromeda XIX is a satellite galaxy of the Andromeda Galaxy (M31), a member of the Local Group, like the Milky Way Galaxy.
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Andromeda XVIII
Andromeda XVIII, discovered in 2008, is a dwarf spheroidal galaxy (has no rings, low luminosity, much dark matter, little gas or dust), which is a satellite of the Andromeda Galaxy (M31).
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Andromeda XXI
Andromeda XXI (And 21, And XXI) is a moderately bright dwarf spheroidal galaxy about away from the Sun in the constellation Andromeda.
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Andromeda XXII
Andromeda XXII (Pisces VI, Triangulum I) is a low surface brightness dwarf spheroidal galaxy about away from the Sun in the constellation Pisces, of the Local Group.
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Andromeda–Milky Way collision
The Andromeda–Milky Way collision is a galactic collision predicted to occur in about 4 billion years between two galaxies in the Local Group—the Milky Way (which contains the Solar System and Earth) and the Andromeda Galaxy.
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Antlia
Antlia (from Ancient Greek ἀντλία) is a constellation in the Southern Celestial Hemisphere.
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Antlia Cluster
The Antlia Cluster (or Abell S0636) is a cluster of galaxies located in the Hydra-Centaurus Supercluster.
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Antlia Dwarf
The Antlia Dwarf is a dwarf spheroidal/irregular galaxy.
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Aquarius Dwarf
The Aquarius Dwarf is a dwarf irregular galaxy, first catalogued in 1959 by the DDO survey.
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Araucaria Project
The Araucaria Project - international science collaboration focused on improving calibration of the extragalactic distance scale based on observations of major distance indicatiors in several nearby galaxies.
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Astronomical spectroscopy
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.
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Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
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Astrophysical maser
An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum.
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Blueshift
A blueshift is any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift.
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Canis Major Overdensity
The Canis Major Dwarf Galaxy (CMa Dwarf) or Canis Major Overdensity (CMa Overdensity) is a disputed dwarf irregular galaxy in the Local Group, located in the same part of the sky as the constellation Canis Major.
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Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty.
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Cassiopeia Dwarf
The Cassiopeia Dwarf (also known as Andromeda VII) is a dwarf spheroidal galaxy about 2.58 Mly away in the constellation Cassiopeia.
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Centaurus A
Centaurus A or NGC 5128 is a galaxy in the constellation of Centaurus.
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Centaurus A/M83 Group
The Centaurus A/M83 Group is a complex group of galaxies in the constellations Hydra, Centaurus, and Virgo.
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Cepheid variable
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.
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Cetus Dwarf
Cetus Dwarf is a dwarf spheroidal galaxy.
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Circinus Galaxy
The Circinus Galaxy (ESO 97-G13) is a Seyfert galaxy in the constellation of Circinus.
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Contact (1997 American film)
Contact is a 1997 American science fiction drama film directed by Robert Zemeckis.
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Cosmic age problem
The cosmic age problem is a historical problem in astronomy concerning the age of the universe.
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Cosmic infrared background
Cosmic infrared background is infrared radiation caused by stellar dust.
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Cosmic microwave background
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
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Cosmological constant
In cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: Λ) is the value of the energy density of the vacuum of space.
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Cosmos: A Personal Voyage
Cosmos: A Personal Voyage is a thirteen-part television series written by Carl Sagan, Ann Druyan, and Steven Soter, with Sagan as presenter.
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Crater 2 Dwarf Galaxy
Crater 2 is a dwarf galaxy discovered orbiting the Milky Way, located approximately 380,000 ly from Earth.
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Creationist cosmologies
Creationist cosmologies are explanations of the origins and form of the universe in terms of the Genesis creation narrative (Genesis 1), according to which God created the cosmos in eight creative acts over the Hexameron, six days of the "creation week".
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Dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe.
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Dark globular cluster
Dark globular cluster is a proposed type of globular star clusters that has an unusually high mass for the number of stars within it.
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Dark matter
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.
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David Dunlap Observatory Catalogue
David Dunlap Observatory Catalogue, known as the DDO or A Catalogue of Dwarf Galaxies, is a catalogue of dwarf galaxies that was published in 1959 (and later expanded in 1966) by Sidney van den Bergh.
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DDO 190
DDO 190 (or UGC 9240) is a dwarf irregular galaxy in the vicinity of the Milky Way, as it is relatively small and lacks clear structure.
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De Sitter universe
A de Sitter universe is a cosmological solution to the Einstein field equations of general relativity, named after Willem de Sitter.
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Detailed logarithmic timeline
This timeline shows the whole history of the universe, the Earth, and mankind in one table.
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Dipole repeller
The dipole repeller is a center of effective repulsion in the large-scale flow of galaxies in the neighborhood of the Milky Way, first detected in 2017.
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Dorado Group
The Dorado Group is a loose concentration of galaxies containing both spirals and ellipticals.
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Draco Dwarf
The Draco Dwarf is a spheroidal galaxy which was discovered by Albert George Wilson of Lowell Observatory in 1954 on photographic plates of the National Geographic Society's Palomar Observatory Sky Survey (POSS).
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Dwarf elliptical galaxy
Dwarf elliptical galaxies, or dEs, are elliptical galaxies that are smaller than ordinary elliptical galaxies.
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Dwarf 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.
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Dwarf galaxy problem
The dwarf galaxy problem, also known as the missing satellites problem, arises from numerical cosmological simulations that predict the evolution of the distribution of matter in the universe.
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Dwarf spheroidal galaxy
A dwarf spheroidal galaxy (dSph) is a term in astronomy applied to small, low-luminosity galaxies with very little dust and an older stellar population.
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Dwingeloo 2
Dwingeloo 2 is a small irregular galaxy discovered in 1996 and located about 10 million light-years away from the Earth.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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Eridanus II
The Eridanus II Dwarf is a low-surface brightness dwarf galaxy in the constellation Eridanus.
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Eva Grebel
Eva K. Grebel is a German astronomer.
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Expansion of the universe
The expansion of the universe is the increase of the distance between two distant parts of the universe with time.
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Extinction (astronomy)
In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer.
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Extragalactic astronomy
Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way galaxy.
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Formation and evolution of the Solar System
The formation and evolution of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.
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Fornax
Fornax is a constellation in the southern sky, partly ringed by the celestial river Eridanus.
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Franz Daniel Kahn
Franz Daniel Kahn (1926–1998) was a mathematician and astrophysicist at the University of Manchester.
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Future of an expanding universe
Observations suggest that the expansion of the universe will continue forever.
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Galactic year
The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy.
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Galaxies in fiction
Galaxies other than the Milky Way are popular settings for creators of science fiction, particularly those working with broad-scale space opera settings.
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Galaxy
A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Galaxy filament
The distribution reveals fine, filamentary structures.
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Galaxy formation and evolution
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.
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Galaxy group
A galaxy group or group of galaxies (GrG) is an aggregation of galaxies comprising about 50 or fewer gravitationally bound members, each at least as luminous as the Milky Way (about 1010 times the luminosity of the Sun); collections of galaxies larger than groups that are first-order clustering are called galaxy clusters.
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Galaxy groups and clusters
Galaxy groups and clusters are the largest known gravitationally bound objects to have arisen thus far in the process of cosmic structure formation.
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Globular cluster
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.
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Gould Belt
The Gould Belt is a partial ring of stars in the Milky Way, about 3000 light years across, tilted toward the galactic plane by about 16 to 20 degrees.
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GR 8
GR 8 (also known as UGC 8091) is a gas-rich dwarf irregular galaxy.
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H II region
An H II region or HII region is a region of interstellar atomic hydrogen that is ionized.
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High-velocity cloud
High-velocity clouds (HVCs) are large collections of gas found throughout the galactic halo of the Milky Way.
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HVC 127-41-330
HVC 127-41-330 is a high-velocity cloud.
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IC 10
IC 10 is an irregular galaxy in the constellation Cassiopeia.
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IC 1613
IC 1613 (also known as Caldwell 51) is an irregular dwarf galaxy, visible in the constellation Cetus near the star 26 Ceti.
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IC 342
IC 342 (also known as Caldwell 5) is an intermediate spiral galaxy in the constellation Camelopardalis relatively close to the Milky Way.
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IC 342/Maffei Group
The IC 342/Maffei Group (also known as the IC 342 Group or the Maffei 1 Group) is the nearest group of galaxies to the Local Group.
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IC 5152
IC 5152 is an irregular galaxy 5.8 million light-years from Earth in the constellation Indus.
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Interstellar cloud
An interstellar cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies.
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KBC Void
The KBC Void, named after astronomers Ryan Keenan, Amy Barger, and Lennox Cowie who first inferred its existence in 2013, is an immense, comparatively empty region of space that contains the Milky Way itself, the Local Group and much of the Laniakea Supercluster.
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KKh 060
KKH 060 is an irregular galaxy and a low surface brightness galaxy located in the direction of the constellation Leo at a distance of 4.89 million light years from Earth.
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KKR 25
KKR 25 is a galaxy 6.07 million light years (1.86 million parsecs) away from the Earth.
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KKs 3
KKs 3 is a dwarf galaxy in the Local Cluster.
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Laniakea Supercluster
The Laniakea Supercluster (Laniakea; also called Local Supercluster or Local SCl or sometimes Lenakaeia) is the galaxy supercluster that is home to the Milky Way and approximately 100,000 other nearby galaxies.
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Large Magellanic Cloud
The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.
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LEDA 74886
LEDA 74886, also known by its 2MASX designation 2MASX J03404323-1838431, is a dwarf galaxy with a rare rectangular shape.
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Leo A
Leo A (also known as Leo III) is an irregular galaxy that is part of the Local Group.
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Leo I (dwarf galaxy)
Leo I is a dwarf spheroidal galaxy in the constellation Leo.
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Leo II (dwarf galaxy)
Leo II (or Leo B) is a dwarf spheroidal galaxy about 690,000 light-years away in the constellation Leo.
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Leo T (dwarf galaxy)
Leo T is a dwarf galaxy situated in the Leo constellation and discovered in 2006 in the data obtained by Sloan Digital Sky Survey.
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Leuschner Observatory
Leuschner Observatory, originally called the Students' Observatory, is an observatory jointly operated by the University of California, Berkeley and San Francisco State University.
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LIGO
The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool.
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List of Andromeda's satellite galaxies
The Andromeda Galaxy (M31) has satellite galaxies just like the Milky Way.
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List of galaxies
The following is a list of notable galaxies.
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List of galaxy groups and clusters
This page lists some galaxy groups and galaxy clusters.
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List of largest cosmic structures
This is a list of the largest cosmic structures so far discovered.
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List of most massive black holes
This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses, or the mass of the Sun (approx. kilograms).
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List of nearest galaxies
This is a list of known galaxies within 3.59 megaparsecs (11.7 million light-years) of the Solar System, in ascending order of distance.
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List of star-forming regions in the Local Group
This is a list of star-forming regions located in the Milky Way Galaxy and in the Local Group.
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List of stars in Andromeda
This is the list of notable stars in the constellation Andromeda, sorted by decreasing brightness.
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List of stellar streams
This is a list of stellar streams.
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List of supernovae
This is a list of supernovae that are of historical significance.
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List of Triangulum's suspected satellite galaxies
The Triangulum subgroup is made up of the Triangulum Galaxy (M33) and its satellites.
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List of voids
This is a list of voids.
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Local Bubble
The Local Bubble, or Local Cavity, is a relative cavity in the interstellar medium (ISM) in the Orion Arm of the Milky Way.
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Local group
Local group may refer to.
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Local Interstellar Cloud
The Local Interstellar Cloud (LIC), also known as the Local Fluff, is the interstellar cloud roughly across through which the Solar System is currently moving.
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Local Sheet
The Local Sheet in astronomy is a nearby extragalactic region of space where the Milky Way, the members of the Local Group and other galaxies share a similar peculiar velocity.
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Local Void
The Local Void is a vast, empty region of space, lying adjacent to the Local Group.
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Locality (astronomy)
Locality in astronomy is in theory closeness of the observer relative to the observed astronomical phenomenon under consideration, and thus in practice the relative closeness of the phenomenon to the star system of the Sun.
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Location of Earth
Knowledge of the location of Earth has been shaped by 400 years of telescopic observations, and has expanded radically in the last century.
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Luminosity function (astronomy)
In astronomy, the luminosity function gives the number of stars or galaxies per luminosity interval.
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M81 Group
The M81 Group is a galaxy group in the constellations Ursa Major and Camelopardalis that includes the galaxies Messier 81 and Messier 82, as well as several other galaxies with high apparent brightnesses.
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M94 Group
The M94 Group (Canes Venatici I Group) is a loose, extended group of galaxies located about 13 million light-years away in the constellations Canes Venatici and Coma Berenices.
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M96 Group
The M96 Group (also known as the Leo I Group) is a group of galaxies in the constellation Leo.
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Maffei 1
Maffei 1 is a massive elliptical galaxy in the constellation Cassiopeia.
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Maffei 2
Maffei 2 is an intermediate spiral galaxy about 10 million light-years away in the constellation Cassiopeia.
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Magellanic Clouds
The Magellanic Clouds (or Nubeculae Magellani) are two irregular dwarf galaxies visible in the Southern Celestial Hemisphere; they are members of the Local Group and are orbiting the Milky Way galaxy.
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Marvel Universe
The Marvel Universe is the shared universe where the stories in most American comic book titles and other media published by Marvel Entertainment take place.
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Mayall II
Mayall II, also known as NGC-224-G1, SKHB 1, GSC 2788:2139, HBK 0-1, M31GC J003247+393440 or Andromeda's Cluster, is a globular cluster orbiting M31, the Andromeda Galaxy.
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MB 3
MB3 is a dwarf spheroidal galaxy discovered in 1997 and located about 10 million light-years away from the Earth.
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Messier 81
Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a spiral galaxy about 12 million light-years away, in the constellation Ursa Major.
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Messier 87
Messier 87 (also known as Virgo A or NGC 4486, generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo.
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MGC1
MGC1 is a globular cluster in the constellation of Pisces.
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Milky Way
The Milky Way is the galaxy that contains our Solar System.
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Multiwavelength Atlas of Galaxies
The Multiwavelength Atlas of Galaxies is a textbook and atlas of 35 well studied galaxies (including our Galaxy) authored by Glen Mackie of the Centre for Astrophysics & Supercomputing, Swinburne University of Technology.
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Mythology of Stargate
In the fictional universe of the Stargate franchise, the people of Earth have encountered numerous extraterrestrial races on their travels through the Stargate.
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NGC 1023 Group
The NGC 1023 group is a group of galaxies about 20.6 million light-years away from Earth.
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NGC 1049
NGC 1049 is a globular cluster located in the Local Group galaxy of Fornax Dwarf, visible in the constellation of Fornax.
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NGC 147
NGC 147 (also known as DDO3 or Caldwell 17) is a dwarf spheroidal galaxy about 2.58 Mly away in the constellation Cassiopeia.
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NGC 1560
NGC 1560, also known as IC 2062, is an 11th-magnitude spiral galaxy, in the IC 342/Maffei Group.
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NGC 185
NGC 185 (also known as Caldwell 18) is a dwarf spheroidal galaxy located 2.08 million light-years from Earth, appearing in the constellation Cassiopeia.
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NGC 206
NGC 206 is a bright star cloud in the Andromeda Galaxy.
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NGC 2403
NGC 2403 (also Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis.
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NGC 2500
NGC 2500 is a barred spiral galaxy in the constellation Lynx which was discovered by William Herschel in 1788.
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NGC 2775
NGC 2775 (also known as Caldwell 48) is an unbarred spiral galaxy with a prominent ring structure in the constellation Cancer.
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NGC 2915
NGC 2915 is a blue dwarf galaxy located 12 million light-years away in the southern constellation Chamaeleon, right on the edge of the Local Group.
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NGC 2997 Group
The NGC 2997 group is a group of galaxies about 24.8 million light-years from Earth containing NGC 2997 as a member.
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NGC 300
NGC 300 is a spiral galaxy in the constellation Sculptor.
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NGC 3109
NGC 3109 is a small barred Magellanic type spiral or irregular galaxy around 4.2 Mly away in the direction of the constellation of Hydra.
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NGC 404
NGC 404 is a field galaxy located about 10 million light years away in the constellation Andromeda.
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NGC 4178
NGC 4178 is the New General Catalogue identifier for a barred spiral galaxy in the equatorial constellation of Virgo.
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NGC 4244
NGC 4244, also Caldwell 26, is an edge-on loose Spiral galaxy and Caldwell object in the constellation Canes Venatici.
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NGC 4449
NGC 4449 is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 12 million light-years away.
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NGC 55
NGC 55, also occasionally referred to as The Whale Galaxy, is a Magellanic type barred spiral galaxy located about 7 million light-years away in the constellation Sculptor.
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NGC 604
NGC 604 is an H II region inside the Triangulum Galaxy.
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NGC 6822
NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius.
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NGC 6946
NGC 6946 is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus.
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Noah Brosch
Noah Brosch (born 1948) is an Israeli astronomer, astrophysicist and space researcher.
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Norma (constellation)
Norma is a small constellation in the Southern Celestial Hemisphere between Ara and Lupus, one of twelve drawn up in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments.
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Omega Centauri
Omega Centauri (ω Cen or NGC 5139) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677.
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Open cluster
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.
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Orders of magnitude (length)
The following are examples of orders of magnitude for different lengths.
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Orders of magnitude (mass)
To help compare different orders of magnitude, the following lists describe various mass levels between 10−40 kg and 1053 kg.
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Orders of magnitude (numbers)
This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity and probabilities.
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Orders of magnitude (volume)
The table lists various objects and units by the order of magnitude of their volume.
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Orion Arm
The Orion Arm is a minor spiral arm of the Milky Way some across and approximately in length, containing the Solar System, including the Earth.
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Outer space
Outer space, or just space, is the expanse that exists beyond the Earth and between celestial bodies.
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Outline of Earth
The following outline is provided as an overview of and topical guide to the planet Earth: Earth – third planet from the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets, and the only astronomical object known to harbor life.
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Outline of galaxies
The following outline is provided as an overview of and topical guide to galaxies: Galaxies – gravitationally bound systems of stars, stellar remnants, interstellar gas, dust, and dark matter.
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Palomar 12
Palomar 12 is a globular cluster in the constellation Capricornus.
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Patricia Whitelock
Professor Patricia Ann Whitelock is a South African astrophysicist and a member of the Academy of Science of South Africa.
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Paul W. Hodge
Paul W. Hodge (born 1934) is an American astronomer whose principal area of research is the stellar populations of galaxies.
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Pegasus Dwarf Irregular Galaxy
The Pegasus Dwarf Irregular Galaxy (also known as Peg DIG or the Pegasus Dwarf) is a dwarf irregular galaxy in the direction of the constellation Pegasus.
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Pegasus Dwarf Spheroidal Galaxy
The Pegasus Dwarf Spheroidal (also known as Andromeda VI or Peg dSph for short) is a dwarf spheroidal galaxy about 2.7 million light-years away in the constellation Pegasus.
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Perry Rhodan
Perry Rhodan is the eponymous hero of a German science fiction novel series which has been published each week since 8 September 1961 in the 'Romanhefte' format (digest-sized booklets, usually containing 66 pages, the German equivalent of the now-defunct American pulp magazine) by, a subsidiary of Bauer Media Group.
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Pisces Dwarf
Pisces Dwarf is an irregular dwarf galaxy that is part of the Local Group.
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Pisces–Cetus Supercluster Complex
The Pisces–Cetus Supercluster Complex is a galaxy filament.
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Proper motion
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.
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R. Jay GaBany
Robert Jay GaBany (born September 17, 1954 in Charleston, West Virginia) is an American amateur astronomer and astrophotographer who is also known for his work with an international team of astrophysicists led by (Max Planck Institute for Astronomy).
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Redshift
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.
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Redshift quantization
Redshift quantization, also referred to as redshift periodicity, redshift discretization, preferred redshifts and redshift-magnitude bands, is the hypothesis that the redshifts of cosmologically distant objects (in particular galaxies and quasars) tend to cluster around multiples of some particular value.
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Reticulum II
Reticulum II (or Reticulum 2) is an old dwarf galaxy in the Local Group.
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RR Lyrae variable
RR Lyrae variables are periodic variable stars, commonly found in globular clusters.
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Sagittarius Dwarf Irregular Galaxy
The Sagittarius Dwarf Irregular Galaxy or SagDIG is a dwarf galaxy in the constellation of Sagittarius.
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Satellite galaxies of the Milky Way
The Milky Way has several smaller galaxies gravitationally bound to it, as part of the Milky Way subgroup, which is part of the local galaxy cluster, the Local Group.
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Satellite galaxy
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).
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Schild's Ladder
Schild's Ladder is a 2002 science fiction novel by Australian author Greg Egan.
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Sculptor (constellation)
Sculptor is a small and faint constellation in the southern sky.
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Sculptor Dwarf Galaxy
The Sculptor Dwarf Galaxy (also known as Sculptor Dwarf Elliptical Galaxy or the Sculptor Dwarf Spheroidal Galaxy) is a dwarf spheroidal galaxy that is a satellite of the Milky Way.
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Sculptor Dwarf Irregular Galaxy
The Sculptor Dwarf Irregular Galaxy (SDIG) is an irregular galaxy in the constellation Sculptor.
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Sculptor Group
The Sculptor Group is a loose group of galaxies near the south galactic pole.
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Sextans
Sextans is a minor equatorial constellation which was introduced in 1687 by Johannes Hevelius.
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Sextans A
Sextans A (also known as UGCA 205) is a tiny dwarf irregular galaxy.
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Sextans B
Sextans B (also known as UGC 5373 and DDO 70) is an irregular galaxy that may be part of the Local Group, or lie just beyond it.
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Shapley Supercluster
The Shapley Supercluster or Shapley Concentration (SCl 124) is the largest concentration of galaxies in our nearby universe that forms a gravitationally interacting unit, thereby pulling itself together instead of expanding with the universe.
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Small Magellanic Cloud
The Small Magellanic Cloud (SMC), or Nubecula Minor, is a dwarf galaxy near the Milky Way.
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Star
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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Star Fleet Universe
The Star Fleet Universe (SFU) is the variant of the Star Trek fictional universe detailed in the series of Star Fleet Battles games (board-, card-, and role-playing) from Amarillo Design Bureau Inc. and used as reference for the Star Trek: Starfleet Command series of computer games.
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Starburst region
A starburst is an astrophysical process that involves star formation occurring at a rate that is large compared to the rate that is typically observed.
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Starry Night (planetarium software)
Starry Night is a commercial planetarium software package, available for macOS and Microsoft Windows.
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Super race
A super race is a future race of improved humans that it is proposed be created from present-day human beings by deploying various means such as eugenics, euthenics, genetic engineering, nanotechnology, and/or brain-computer interfacing to accelerate the process of human evolution.
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Supercluster
A supercluster is a large group of smaller galaxy clusters or galaxy groups; it is among the largest-known structures of the cosmos.
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Supergalaxy
Supergalaxy, super-galaxy, or super galaxy can refer to.
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Supermassive black hole
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.
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Systems Commonwealth
The All Systems Commonwealth or simply the Systems Commonwealth is a fictional intergalactic government from Gene Roddenberry's science fiction TV series Andromeda.
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TAMA 300
TAMA 300 was a gravitational wave detector located at the Mitaka campus of the National Astronomical Observatory of Japan.
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Tarantula Nebula
The Tarantula Nebula (also known as 30 Doradus) is an H II region in the Large Magellanic Cloud (LMC).
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The World We Live In (Life magazine)
The World We Live In appeared in the pages of LIFE magazine from December 8, 1952, to December 20, 1954.
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Timeline of the far future
While predictions of the future can never be absolutely certain, present understanding in various scientific fields allows for the prediction of far-future events, if only in the broadest outline.
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Tip of the red-giant branch
Tip of the red-giant branch (TRGB) is a primary distance indicator used in astronomy.
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Triangulum
Triangulum is a small constellation in the northern sky.
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Triangulum Galaxy
The Triangulum Galaxy is a spiral galaxy approximately 3 million light-years (ly) from Earth in the constellation Triangulum.
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Tucana
Tucana is a constellation of stars in the southern sky, named after the toucan, a South American bird.
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Tucana Dwarf
The Tucana Dwarf Galaxy is a dwarf galaxy in the constellation Tucana.
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Type II Cepheid
Type II Cepheids are variable stars which pulsate with periods typically between 1 and 50 days.
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UGC 4879
UGC 4879, which is also known as VV 124, is the most isolated dwarf galaxy in the periphery of the Local Group.
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UGCA 86
UGCA 86 is a Magellanic spiral galaxy.
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Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
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Ursa Major
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
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Vacuum
Vacuum is space devoid of matter.
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Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.
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Velocity dispersion
In astronomy, the velocity dispersion (σ) is the statistical dispersion of velocities about the mean velocity for a group of objects, such as an open cluster, globular cluster, galaxy, galaxy cluster, or supercluster.
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Virgo Cluster
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.
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Virgo Stellar Stream
The Virgo Stellar Stream, also known as Virgo Overdensity, is the proposed name for a stellar stream in the constellation of Virgo which was discovered in 2005.
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Virgo Supercluster
The Virgo Supercluster (Virgo SC) or the Local Supercluster (LSC or LS) is a mass concentration of galaxies containing the Virgo Cluster and Local Group, which in turn contains the Milky Way and Andromeda galaxies.
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Virgocentric flow
The Virgocentric flow (VCF) is the preferred movement of Local Group galaxies towards the Virgo cluster caused by its overwhelming gravity, which separates bound objects from the Hubble flow of cosmic expansion.
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Westerhout 5
Westerhout 5 (Sharpless 2-199, LBN 667, Soul Nebula) is an emission nebula located in Cassiopeia.
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Wolf–Lundmark–Melotte
The Wolf–Lundmark–Melotte (WLM) is an irregular galaxy discovered in 1909 by Max Wolf, located on the outer edges of the Local Group.
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Wolf–Rayet star
Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.
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Wormholes in fiction
An Einstein–Rosen bridge, or wormhole, is a postulated method, within the general theory of relativity, of moving from one point in space to another without crossing the space between.
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Zero-velocity surface
The zero-velocity surface is a concept that relates to the N-body problem of gravity.
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Redirects here:
Andromeda Cluster, Andromeda Galactic Group, Andromeda Group, List of Local Group galaxies, Local Cluster, Local Galactic Group, Local Galaxy Group, Local cluster, Local galaxies group, Local group of galaxies, Milkomeda Cluster, Milkomeda Galactic Group, Milkomeda Group, The Local Group, The Local Group of Galaxies.
References
[1] https://en.wikipedia.org/wiki/Local_Group
