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Central object of a galaxy
A central massive object (CMO) is a high mass object or cluster of objects at the centre of a large star system, such as a galaxy or globular cluster.
Central_massive_object
Largest type of black hole
a nuclear star cluster. The co-existence of these two types of central massive objects was quantified in 2009, with a mathematical mass scaling relation
Supermassive_black_hole
Rotational center of the Milky Way galaxy
a corresponding point on the rotational axis of the galaxy. Its central massive object is a supermassive black hole of about 4 million solar masses, which
Galactic_Center
Star cluster in the center of a galaxy
central massive objects of fainter, low-mass galaxies where supermassive black holes (SMBHs) often co-exist or are not present. In the most massive galaxies
Nuclear_star_cluster
Accumulation of particles into a massive object by gravitationally attracting more matter
into a massive object by gravitationally attracting more matter, typically gaseous matter, into an accretion disk. Most astronomical objects, such as
Accretion_(astrophysics)
Topics referred to by the same term
Organisation Congressional caucus or congressional member organization Central massive object at the center of a galaxy, either a supermassive black hole, or
CMO
Galaxies with interacting gravitational fields
host radiatively efficient AGN fueled by cold gas, while passive and more massive galaxies host radio AGN fueled by mechanically dominated accretion. A 2020
Interacting_galaxy
Galaxy that orbits a larger galaxy due to gravitational attraction
collisions between objects from one galaxy and objects from the other, however, these events generally result in much more massive galaxies. Consequently
Satellite_galaxy
because they cross the orbits of one or more of the giant planets. central massive object (CMO) Any very large concentration of mass at the center of a galaxy
Glossary_of_astronomy
Spacetime modeled by four pointwise-orthonormal vector fields
{\displaystyle {\vec {h}}_{2}} as the observer orbits around the central massive object. However, after correcting for this observation, a small precession
Frame fields in general relativity
Frame_fields_in_general_relativity
Structure formed by diffuse material in orbital motion around a massive central body
disk) formed by diffuse material in orbital motion around a massive central body. The central body is most frequently a star. Friction, uneven irradiance
Accretion_disk
Computer data storage architecture that manages data as objects
replication and data distribution at object-level granularity. Object storage systems allow retention of massive amounts of unstructured data in which
Object_storage
Topics referred to by the same term
galaxy Bulge (astronomy), the core of spiral galaxies in general Central massive object, the mass concentration at the center of a galaxy Supermassive black
Galactic_core
Type of starburst galaxy
investigated. Both objects are at redshift z=~ 0.0472. Their conclusions (shortened & quoted) find that the BB is: is the most massive and metal-rich one
Blueberry_galaxy
Compact astronomical body
arbitrary distances from a central object. In general relativity, however, there exists a smallest possible radius for which a massive particle can orbit stably
Black_hole
Quasar and Lyman-alpha blob in the constellations of Canes Venatici and Coma Berenices
such an object; higher than the mass of all the stars in the Milky Way galaxy combined, which is 64 billion M☉, and 15,300 times more massive than Sagittarius
TON_618
Hypothetical early-universe star with a black hole core
astronomical object in the constellation Boötes Direct collapse black hole – High-mass black hole seeds Neutron star – Collapsed core of a massive star Quasar –
Quasi-star
Citizen science project
"something that none of us had even thought would be possible." WATGs are rare objects that are formed when jets of electrons from black holes, usually seen to
Radio_Galaxy_Zoo
Solar system objects beyond Neptune
1992 to discover a second trans-Neptunian object orbiting the Sun directly, 15760 Albion. The most massive TNO known is Eris, followed by Pluto, Haumea
Trans-Neptunian_object
This is a list of the most massive stars that have been discovered, in solar mass units (M☉). Most of the masses listed below are contested and, being
List_of_most_massive_stars
Smallest stable circular orbit of a particle
marginally stable circular orbit in which a test particle can stably orbit a massive object in general relativity. The location of the ISCO, the ISCO-radius ( r
Innermost stable circular orbit
Innermost_stable_circular_orbit
Education service on the web
A massive open online course (MOOC /muːk/) or an open online course is an online course aimed at unlimited participation and open access via the Web.
Massive_open_online_course
Apparent unusual observation in the sky
An unidentified flying object (UFO) is an object or phenomenon seen in the sky but not yet identified or explained. The term was coined when United States
Unidentified_flying_object
Changes to stars over their lifespans
dwarfs as stars massive enough to fuse deuterium at some point in their lives (13 Jupiter masses (MJ), 2.5 × 1028 kg, or 0.0125 M☉). Objects smaller than
Stellar_evolution
A star is a massive luminous spheroid astronomical object made of plasma that is held together by its own gravity. Stars exhibit great diversity in their
List_of_star_extremes
Subfield of cosmology
a mathematical mass scaling relation exists between these two central massive objects. Metallicity has a positive correlation with the luminosity of
Galaxy formation and evolution
Galaxy_formation_and_evolution
Heterogeneous class of stars with unusual spectra
are completely different objects from the WN stars without hydrogen. Despite the similar spectra, they are much more massive, much larger, and some of
Wolf–Rayet_star
redshift is disputed. Some follow-up observations have failed to find the object at all.[citation needed] STIS 123627+621755, discovered in 1999, with z=6
List_of_galaxies
Attraction of masses and energy
escape from a sufficiently large and compact object. Frame dragging, the idea that a rotating massive object should twist spacetime around it, was confirmed
Gravity
This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (M☉), about 2×1030 kilograms
List of most massive black holes
List_of_most_massive_black_holes
Speed at which a body orbits around the barycenter of a system
point of the orbit can be computed from its distance to the central body and the object's specific orbital energy, sometimes called "total energy". Specific
Orbital_speed
Largest dwarf planet
tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume by a small margin, but is less massive than
Pluto
Large self-illuminated object in space
patches of nebulosity known as Herbig–Haro objects. These jets, in combination with radiation from nearby massive stars, may help to drive away the surrounding
Star
Astronomical bodies believed or speculated to exist
philosopher Philolaus defined a hypothetical astronomical object which he called the "Central Fire", around which he proposed other celestial bodies (including
Hypothetical astronomical object
Hypothetical_astronomical_object
European space mission to measure gravitational waves
galaxies, massive black holes orbited by small compact objects, known as extreme mass ratio inspirals, binaries of compact stars, substellar objects orbiting
Laser Interferometer Space Antenna
Laser_Interferometer_Space_Antenna
Astronomical object without the mass to sustain hydrogen fusion
with decreasing mass until, at the mass of Jupiter, a substellar object has a central density less than 10 g/cm3. The density decrease balances the mass
Substellar_object
Emission nebula in the constellation Sagittarius
Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers. The most massive star that has formed in this region
Trifid_Nebula
Stellar classification
neutron stars. Most of these stars are young massive main sequence, giant, or supergiant stars, but also some central stars of planetary nebulae, old low-mass
O-type_star
Comparison of a wide range of masses
1052 kg. The least massive thing listed here is a graviton, and the most massive thing is the observable universe. Typically, an object having greater mass
Orders_of_magnitude_(mass)
Galaxy cluster in the constellation Phoenix
The Phoenix Cluster (SPT-CL J2344-4243) is a massive, Abell-class type I galaxy cluster located at its namesake, southern constellation of Phoenix. It
Phoenix_Cluster
Natural physical entity in space
An astronomical object, celestial object, stellar object or heavenly object is a naturally occurring physical entity, association, or structure that exists
Astronomical_object
Galaxy in the constellation Virgo
The Sombrero Galaxy (also known as Messier Object 104, M104 or NGC 4594) is a peculiar galaxy of unclear classification in the constellation borders of
Sombrero_Galaxy
Supermassive black hole at the center of the Milky Way
contains a cluster of dark stellar objects or a mass of degenerate fermions, strengthening the evidence for a massive black hole. The observations of S2
Sagittarius_A*
Barred spiral galaxy in the Local Group
of microlensing—a phenomenon caused by the deflection of light by a massive object—may have led to the first discovery of a planet in the Andromeda Galaxy
Andromeda_Galaxy
Grouping of stars by similar metallicity
masses became hundreds of times more than that of the Sun. In turn, these massive stars also evolved very quickly, and their nucleosynthetic processes created
Stellar_population
Active galactic nucleus (AGN) containing a supermassive black hole
rather to light escaping a deep gravitational well. This would require a massive object, which would also explain the high luminosities. However, a star of
Quasar
Star at the centre of the Solar System
defined to be 149.5978707×106 kilometres. It is the largest and most massive object in the Solar System; its diameter is about 1,391,400 km (864,600 mi)
Sun
nebula named Ou 4 (also known as Squid Nebula). The central star of Ou4 is believed to be the massive triple star system named HD 202214 (O9.5IV). "Sh 2-129"
Sh_2-129
Motion problem in classical mechanics
of the single remaining mobile object. Such an approximation can give useful results when one object is much more massive than the other (as with a light
Two-body_problem
Disked object that eclipsed V1400 Centauri
dimming in 2007 led astronomers to suspect that it was caused by an object with a massive disk eclipsing the star, which became known as J1407b. This idea
J1407b
Type of emission nebula created by dying red giants
Messier on July 12, 1764, and listed as M27 in his catalogue of nebulous objects. To early observers with low-resolution telescopes, M27 and subsequently
Planetary_nebula
Hypothetical Solar System planet
distant detached objects would have orbits anti-aligned with the massive planet. Trujillo and Sheppard argued in 2014 that a massive planet in a circular
Planet_Nine
Planet outside of the Solar System
April 2014 are massive and have wide orbits so probably represent the low-mass end of a brown dwarf formation. One study suggests that objects above 10 MJup
Exoplanet
Astrophysical phenomenon
evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either
Supernova
allow accurate measurements of the mass and angular momentum of the central object, which in turn gives crucial input for models for the formation and
Extreme_mass_ratio_inspiral
Classification in astronomy
will result in a smaller object. Continuing to add mass to what begins as a white dwarf, the object shrinks and the central density becomes even greater
Compact_object
Small planetary-mass object
discovery A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, massive enough to be gravitationally rounded, but insufficient
Dwarf_planet
Area of the Solar System beyond the planets, comprising small bodies
trans-Neptunian objects (TNOs). Pluto is the largest and most massive known member of the Kuiper belt and the largest and the second-most-massive known TNO
Kuiper_belt
List of largest planets by size
exoplanets List of directly imaged exoplanets Lists of astronomical objects List of most massive stars "Observing Exoplanets: What Can We Really See?". NASA Science
List_of_largest_exoplanets
Collapsed core of a massive star
sufficient to hold up an object beyond 0.7 M☉ and repulsive nuclear forces increasingly contribute to supporting more massive neutron stars. If the remnant
Neutron_star
Galaxy in the constellation Ursa Major
about the nature of this object, but currently no theory entirely fits the observed data. It has been suggested that the object could be an unusual "micro
Messier_82
Type of star that is massive and luminous
Supergiants are among the most massive and most luminous stars. Supergiant stars occupy the top region of the Hertzsprung–Russell diagram, with absolute
Supergiant
Wolf–Rayet star in the constellation Dorado
Cloud (LMC). Among the objects cataloged was RMC 136 (Radcliffe observatory Magellanic Cloud catalog number 136), the central "star" of the Tarantula
R136a1
Nebula in the Large Magellanic Cloud
N79. N79-S in mid-infrared with JWST. The bright object in the upper half contains the five most massive YSOs of the super star cluster. N79-S in near-infrared
LMC_N79
Planet not gravitationally bound to a star
regions of which astronomers know their age. These objects are younger than 200 Myrs, are massive (>5 MJ) and belong to the L- and T-dwarfs. There is
Rogue_planet
Diffuse nebula in the constellation Orion
0 ± 5.4 light-years (388.5 ± 1.7 pc) away and is the closest region of massive star formation to Earth. M42 is estimated to be 25 light-years across (so
Orion_Nebula
Globular cluster in the constellation Centaurus
cause was the gravitational pull of a dense, massive object such as a black hole. They calculated the object's mass at 40,000 solar masses. More recent work
Omega_Centauri
Prime astronomical designated entity within a gravitational system
called a central body, host body, gravitational primary, or simply primary – is the main physical body of a gravitationally bound, multi-object system.
Primary_body
Poorly understood class of astronomical objects
astronomy Little red dots (LRDs) are a class of small, red-tinted astronomical objects discovered by the James Webb Space Telescope (JWST). Their discovery was
Little red dot (astronomical object)
Little_red_dot_(astronomical_object)
Super star cluster in the constellation Dorado, in the Large Magellanic Cloud
Large Magellanic Cloud. When originally named it was an unresolved stellar object (catalogued as HD 38268 and Wolf–Rayet star Brey 82) but is now known to
R136
Spiral galaxy in the constellation Ursa Major
Z.; Jocoby, J. (2003). "STIS Spectroscopy of the Central 10 Parsecs of M81: Evidence for a Massive Black Hole". Astronomical Journal. 125 (3): 1226–1235
Messier_81
Xinyu; Guerras, Eduardo (November 2019). "Confirmation of Planet-mass Objects in Extragalactic Systems". The Astrophysical Journal. 885 (1): 77. arXiv:1909
List_of_exoplanet_extremes
Program optimization approach in computing
data-oriented design. It is contrasted with the array of structures typical of object-oriented designs. The definition of data-oriented design as a programming
Data-oriented_design
Star in the constellation Orion, in the center of the Orion's Belt
a massive, blue supergiant star some 1,250 light-years distant. It is estimated to be 270,000 times as luminous as the Sun, and 28 times as massive. It
Alnilam
Galaxy in the constellation Virgo
containing a massive nuclear star cluster with an estimated mass of 1 million solar masses (M☉) and an age of 4 million years, as well as a central candidate
Messier_61
Supernova remnant in the constellation Taurus
Chinese astronomers as a guest star. The nebula was the first astronomical object identified that corresponds with a historically-observed supernova explosion
Crab_Nebula
Galaxy in the constellation Virgo
Virgo that contains several trillion stars. One of the largest and most massive galaxies in the local universe, it has a large population of globular clusters—about
Messier_87
Hypothesized alternative to a black hole
astrophysics, a gravastar (a blend word of "gravitational vacuum star") is an object hypothesized in a 2001 paper by Pawel O. Mazur and Emil Mottola as an alternative
Gravastar
Gravitational process studied in astronomy
origin of the CMF/IMF. Accretion – Accumulation of particles into a massive object by gravitationally attracting more matter Champagne flow model Chronology
Star_formation
Type of neutron star with beams of radiation
a series of pulses, evenly spaced every 1.337 seconds. No astronomical object of this nature had ever been observed before. On December 21, Bell discovered
Pulsar
Country in Central Africa
world after the Amazon rainforest. This massive expanse of lush jungle covers most of the vast, low-lying central basin of the river, which slopes toward
Democratic Republic of the Congo
Democratic_Republic_of_the_Congo
Galaxies in the constellation Corvus
"Detailed Information for Object NGC 4038". NASA/IPAC Extragalactic Database. Retrieved August 3, 2025. "Detailed Information for Object NGC 4039". NASA/IPAC
Antennae_Galaxies
Type of star larger than main-sequence but smaller than a giant
due to differences in the internal configuration of the star. Stars less massive than about 0.4 M☉ are convective throughout most of the star. These stars
Subgiant
Galaxy in the constellation Coma Berenices
gases towards its central SMBH. On December 5, 2011, astronomers measured the velocity dispersion of the central regions of two massive galaxies, NGC 4889
NGC_4889
Constellation split into two non-contiguous parts
striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming
Serpens
Feature seen when light is gravitationally lensed by an object
Chwolson), is created when light from a galaxy or star passes by a massive object en route to the Earth. Due to gravitational lensing, the light is diverted
Einstein_ring
Reflection nebula in the constellation Cygnus
hundreds of young stellar objects. Young stars are seen in both the emission nebula, where gas has been ionized by massive young stars, and in the infrared-dark
IC_5146
Spiral galaxy in the constellation Triangulum
a professional database, gathers formal designations for astronomical objects and indicates that Pinwheel Galaxy refers to Messier 101, which several
Triangulum_Galaxy
Small number of stars that orbit each other
through space. The primary has a massive dust disk similar to that of the early Solar System, but much more massive. It also contains a gas giant, Fomalhaut
Star_system
Long-period exoplanet orbiting b Centauri
the system in 2019 revealed an object at a 5.3 arcseconds separation that had infrared colors consistent with a massive planet. A second observation in
B_Centauri_b
Wikimedia Commons has media related to white dwarfs. Lists of astronomical objects Lists of stars List of exoplanets and planetary debris around white dwarfs
List_of_white_dwarfs
Curved South East Asian knife
knife down between operations, if use of the fingers to manipulate the object to be worked on is required (such as the action of cutting and opening a
Karambit
Effect of general relativity
as the Lense–Thirring effect. They predicted that the rotation of a massive object would distort the spacetime metric, making the orbit of a nearby test
Frame-dragging
Galaxy in the constellation Virgo
The central mass-to-light ratio is 6.5, which, to a limit, steadily increases away from the core. The visible galaxy is surrounded by a massive dark
Messier_84
Classification of stars based on spectral properties
numerals has been proposed: type I for less massive neutron stars with low cooling rates, type II for more massive neutron stars with higher cooling rates
Stellar_classification
Moon of Orcus
size of Orcus and the third-largest moon of a trans-Neptunian object. Vanth is massive enough that it shifts the barycenter of the Orcus–Vanth system
Vanth_(moon)
Natural satellites of the planet Jupiter
equivalent Zeus. The Galilean moons are by far the largest and most massive objects to orbit Jupiter, with the remaining 111 known moons and the rings
Moons_of_Jupiter
16th-century Mexica sculpture
same gallery as the Aztec Sun Stone. The Stone of Motecuhzoma I is a massive object approximately 12 feet in diameter and 3 feet high with the 8 pointed
Aztec_sun_stone
System of stars and interstellar matter
18 mag/arcsec2 at its central region. This brightness is equivalent to the light of an 18th magnitude hypothetical point object (like a star) being spread
Galaxy
Galaxy in the constellation Canes Venatici
was discovered on October 13, 1773, by Charles Messier while hunting for objects that could confuse comet hunters, and was designated in Messier's catalogue
Whirlpool_Galaxy
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Tamil
Giant; Huge; Massive; Great
Girl/Female
Hindu, Indian, Marathi, Tamil, Traditional
Central
Female
English
Variant spelling of English Missy, MISSIE means "honey-sap."
Boy/Male
Hindu, Indian, Iranian, Russian
A Massive
Boy/Male
Tamil
Massive, Very big, Giant proportioned
Male
Italian
Italian form of Latin Maximus, MASSIMO means "the greatest."
Surname or Lastname
English (southeastern and central)
English (southeastern and central) : topographic name for someone who lived by some oak trees, from misdivision of Middle English atten okes ‘at the oaks’ (see Nock).
Boy/Male
Hindu
Massive, Very big, Giant proportioned
Surname or Lastname
English (chiefly central and northern), Scottish, and Irish
English (chiefly central and northern), Scottish, and Irish : variant of Hanley.
Surname or Lastname
English (mainly central England)
English (mainly central England) : patronymic from a pet form of the personal name Thomas.
Female
English
Pet form of English Cass, CASSIE means "she who entangles men."
Female
English
 Anglicized form of Scottish Mysie, a pet form of Mairead (English Margaret), MAISIE means "pearl." British English name meaning "field."
Surname or Lastname
English
English : variant of Mace 1.French (Picardy) : metonymic occupational name from masse ‘mace’, ‘hammer’.French : habitational name from places called Masse (Allier and Cô-d’Or), or La Masse (Eure, Lot, Puy-de-Dôme, Saône-et-Loire).French (Massé) : habitational name from a place called Massé in Maine-et-Loire, so named from Gallo-Roman Macciacum (from the personal name Maccius + the locative suffix -acum).Dutch : from Middle Dutch masse ‘clog’; ‘cudgel’, perhaps a metonymic occupational name for someone who wielded a club.Dutch : possibly a variant of Maas 1, or a patronymic from Mas.
Girl/Female
Indian, Telugu
Unexpected; Massive
Boy/Male
Hindu
Massive, Very big, Giant proportioned
Surname or Lastname
English (mainly central)
English (mainly central) : topographic name for someone who lived where holly trees grew, from Middle English holi(n)s, plural of holin, holi(e) (Old English hole(g)n).
Boy/Male
Tamil
Massive, Very big, Giant proportioned
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit
Central; Centre of Body; An Ancient King
Girl/Female
Tamil
Central
Girl/Female
Hindu, Indian, Kannada, Marathi, Sindhi, Tamil, Telugu
Central
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
Boy/Male
Arthurian Legend
Percival's father.
Boy/Male
Greek
Guardian to the gate of Hades.
Boy/Male
Hindu, Indian
Power; Indestructible Vishnu Like
Boy/Male
Hindu
Forest
Boy/Male
Indian, Malayalam, Marathi
God Gift
Boy/Male
Australian, Polish
To do Away with Anger; To Dispel Anger
Boy/Male
Indian, Telugu
Mark; Hidden; Wisdom; Secret
Boy/Male
Arabic, Muslim
Knowledgeable
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Mythological, Sanskrit, Telugu
Name of Lord Shiva; Sun; Rudraksha; 'mightiest of the Mighty
Male
French
Norman French name derived from Latin Alvinius, ALVIN means "elf friend."
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
CENTRAL MASSIVE-OBJECT
v. t.
To place or fix in the center or on a central point.
n.
Alt. of Centrale
a.
Alt. of Centrical
n.
Specially sent; intended or prepared to be sent; as, a letter missive.
n.
Alt. of Masse shot
pl.
of Centrum
adv.
In a central manner or situation.
a.
Placed in the center or middle; central.
a.
Massive, like timber.
a.
Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the ventral fin of a fish; the ventral root of a spinal nerve; -- opposed to dorsal.
a.
In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive.
adv.
Toward the ventral side; on the ventral side; ventrally; -- opposed to dorsad.
n.
The central, or one of the central, bones of the carpus or or tarsus. In the tarsus of man it is represented by the navicular.
a.
Sending out; emitting; as, emissive powers.
a.
Not active, but acted upon; suffering or receiving impressions or influences; as, they were passive spectators, not actors in the scene.
n.
Missile.
v. i.
To be placed in a center; to be central.
a.
Receiving or enduring without either active sympathy or active resistance; without emotion or excitement; patient; not opposing; unresisting; as, passive obedience; passive submission.
a.
Inactive; inert; not showing strong affinity; as, red phosphorus is comparatively passive.