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Number of stars within a unit volume
Stellar density is the average number of stars within a unit volume. It is similar to the stellar mass density, which is the total solar masses (MSun)
Stellar_density
Galaxy cluster in the constellation Phoenix
M. Brockamp and colleagues had used a modelling of the innermost stellar density of the central galaxy and the adiabatic process that fuels the growth
Phoenix_Cluster
Postulated future astronomical event
probably be a giant elliptical galaxy, but with a centre showing less stellar density than current elliptical galaxies. It is, however, possible the resulting
Andromeda–Milky_Way_collision
Type of star cluster
more massive star. However, the stellar density in open clusters is much lower than that in globular clusters, and stellar collisions cannot explain the
Open_cluster
Minor spiral arm of the Milky Way galaxy; contains the Solar System
compare both the stellar density and gas distribution along the Local Arm. Researchers have found a marginally significant arm-like stellar overdensity close
Orion_Arm
Astronomy phenomenon
The Sun resides in a region of relatively low stellar density in the Milky Way. Thus, close stellar flybys are relatively rare. However, once in a while
Stellar_flyby
Region at the center of a star
for stellar hydrogen fusion exceeds 107 K (10 MK), while the density at the core of the Sun is over 100 g/cm3. The core is surrounded by the stellar envelope
Stellar_core
Unit of length in astronomy
only star in its cubic parsec, (pc3) but in globular clusters the stellar density could be from 100–1000 pc−3. The observational volume of gravitational
Parsec
Structure of stars
radius. In forming the stellar structure equations (exploiting the assumed spherical symmetry), one considers the matter density ρ ( r ) {\displaystyle
Stellar_structure
Galaxy containing the Solar System
000 ly), in which it was once believed to be the abrupt drop-off of the stellar density of the disk, meaning that few or no stars were expected to be above
Milky_Way
Classification of stars based on spectral properties
In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is
Stellar_classification
boundary by nature, and are characterized with gradually decreasing stellar density as a function of increasing distance from its center. Because of this
List_of_largest_galaxies
Argument in astrophysics against the theory of an unchanging universe
suppose that the universe were not expanding and always had the same stellar density; then the temperature of the universe would continually increase as
Olbers'_paradox
Branch of astrophysics
Stellar dynamics is the branch of astrophysics which describes in a statistical way the collective motions of stars subject to their mutual gravity. The
Stellar_dynamics
cluster Stellar collision Stellar core Stellar coronae Stellar density Stellar disk Stellar distance Stellar drift Stellar dynamics Stellar engine Stellar envelope
List_of_stellar_properties
Classification in astronomy
Since most compact object types represent endpoints of stellar evolution, they are also called stellar remnants, and accordingly may be called dead stars
Compact_object
Subfield of astronomy
collapse of a gas cloud. Jeans's theorem – Phase-space density conservation in collisionless stellar dynamics. Gravitational compression – Initial collapse
Outline_of_astrophysics
Reaction that combines atomic nuclei
extremely large triple product of temperature, density, and confinement time. These conditions occur only in stellar cores, advanced nuclear weapons, and are
Nuclear_fusion
Globular cluster in the constellation Scorpius
by the Rho Ophiuchi cloud complex. The cluster has a very low core stellar density for a globular cluster and harbors a handful of X-ray radiation sources
NGC_6144
Black hole formed by a collapsed star
A stellar black hole (or stellar-mass black hole) is a black hole formed by the gravitational collapse of a star. They have masses ranging from about 5
Stellar_black_hole
Large self-illuminated object in space
due to its low gas density. The corona region of the Sun is normally only visible during a solar eclipse. From the corona, a stellar wind of plasma particles
Star
Barred spiral galaxy in the Local Group
spheroid was determined to have a higher stellar density than that of the Milky Way, and its galactic stellar disk was estimated at twice the diameter
Andromeda_Galaxy
Open cluster in the constellation Monoceros
probable members – their combined mass is more than 285 M☉, the mean stellar density would thus be 1.3 stars per cubic parsec. It is around 140 million
Messier_50
Globular cluster in the constellation Ophiuchus
9.6 ly (2.95 pc), and a half-light radius of 6.0 ly (1.83 pc). The stellar density at the core is 5.13 M☉ per cubic parsec. It has a tidal radius of 59 ly
Messier_62
Dutch astrophysicist (born 1936)
X-ray binary stars are cooked in the cores of the clusters where the stellar density is very high. With graduate student Jon Miller, Lewin made extensive
Walter_Lewin
Type of emission nebula created by dying red giants
perhaps a few tens of millennia, compared to considerably longer phases of stellar evolution. Once all of the red giant's atmosphere has been dissipated,
Planetary_nebula
Bedin, L. R.; Carraro, G. (July 2004). "Probing the Canis Major stellar over-density as due to the Galactic warp". Astronomy and Astrophysics. 421 (2):
List_of_galaxies
System of stars and interstellar matter
A galaxy is a physical system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from
Galaxy
Pulsar with a rotational period less than about 10 milliseconds
with the spin-up hypothesis of their formation, as the extremely high stellar density of these clusters implies a much higher likelihood of a pulsar having
Millisecond_pulsar
Emission nebula in the constellation Orion
and is located in the northern section of this complex. In terms of stellar density, it is the poorest of the four clusters embedded in the cloud complex
NGC_2023
Star at the centre of the Solar System
Bloecker, T. (1995). "Stellar evolution of low and intermediate-mass stars. I. Mass loss on the AGB and its consequences for stellar evolution". Astronomy
Sun
Gravitational process studied in astronomy
within stars via stellar nucleosynthesis and ejected as the stars pass beyond the end of their main sequence lifetime. Higher density regions of the interstellar
Star_formation
Matter and radiation in the space between the star systems in a galaxy
the ISM are mostly a result of enrichment (due to stellar nucleosynthesis) in the process of stellar evolution. The ISM plays a crucial role in astrophysics
Interstellar_medium
Class of galaxy that has spiral structures extending from their cores
an arm, the space velocity of each stellar system is modified by the gravitational force of the local higher density. Also the newly created stars do not
Spiral_galaxy
Super star cluster in the constellation Dorado, in the Large Magellanic Cloud
become a globular cluster in the future. R136 has around 200 times the stellar density of a typical OB association such as Cygnus OB2. The central R136 concentration
R136
Constellation in the southern celestial hemisphere
explained by the fact that Sculptor contains the south galactic pole where stellar density is very low.[citation needed] Overall, there are 56 stars within the
Sculptor_(constellation)
Globular cluster in the constellation Aquarius
parameters of the globular cluster M 2 determined by ellipse fitting of its stellar density". Physica Scripta. 100 (7): 075005. Bibcode:2025PhyS..100g5005B. doi:10
Messier_2
Binary star system
velocity of 0.4 km/s for the secondary component. Considering the average stellar density in an association like Upper Scorpius, it is estimated that perturbations
UScoCTIO_108
Empirical function in astronomy
where ξ 0 {\displaystyle \xi _{0}} is a constant relating to the local stellar density. Glenn E. Miller and John M. Scalo extended the work of Salpeter, by
Initial_mass_function
Creation of chemical elements within stars
In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars. Stellar nucleosynthesis has occurred
Stellar_nucleosynthesis
Third planet from the Sun
solar day. Earth's rotation period relative to the fixed stars, called its stellar day by the International Earth Rotation and Reference Systems Service (IERS)
Earth
Collapsed core of a massive star
star density to that of atomic nuclei. Surpassed only by black holes, neutron stars are the second-smallest- and second-densest-known class of stellar objects
Neutron_star
Active galactic nucleus (AGN) containing a supermassive black hole
extremely high power density. Considerable discussion took place over what these objects might be. They were described as "quasi-stellar [meaning: star-like]
Quasar
Globular cluster in the constellation Scorpius
cluster rule out an accreting IMBH, but not a quiescent black hole. The stellar density and radial profiles of velocity dispersion rule out an IMBH with a
NGC_6388
Contraction of an astronomical object due to the influence of its gravity
state of equilibrium. Depending on the mass during its lifetime, these stellar remnants can take one of three forms: White dwarfs, in which gravity is
Gravitational_collapse
Galaxy in the constellation Centaurus
calculation using the spheroidal luminosity method by estimating the stellar density of the central region using its brightness, yielded an initial mass
ESO_444-46
Changes to stars over their lifespans
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star, its lifetime can range from a few
Stellar_evolution
Study of the movement of stars
In astronomy, stellar kinematics is the observational study or measurement of the kinematics or motions of stars through space. Stellar kinematics encompasses
Stellar_kinematics
Coming together of two stars
A stellar collision is the coming together of two stars caused by stellar dynamics within a star cluster, or by the orbital decay of a binary star due
Stellar_collision
Measurement of radiant electromagnetic power emitted by an object
system are defined in terms of a spectral flux density. A star's luminosity can be determined from two stellar characteristics: size and effective temperature
Luminosity
Radius of the event horizon of a Schwarzschild black hole
1 million M☉. Stellar black holes have much greater average densities than supermassive black holes. If one accumulates matter at nuclear density (the density of
Schwarzschild_radius
Small galaxy composed of up to several billion stars
galaxies (UCD) are a class of very compact galaxies with very high stellar densities, discovered in the 2000s. They are thought to be on the order of 200
Dwarf_galaxy
Hypothesis that complex extraterrestrial life is improbable and extremely rare
increases. Thus the early universe, and present-day galactic regions where stellar density is high and supernovae are common, will be dead zones. Gravitational
Rare_Earth_hypothesis
Subfield of astronomy
theoretical astrophysicists include Solar System formation and evolution; stellar dynamics and evolution; galaxy formation and evolution; magnetohydrodynamics;
Astrophysics
X-ray binary
binary through mass transfer and gravitational wave emission. The high stellar density of the globular cluster facilitates the formation of such compact binaries
47_Tucanae_X9
Spherical collection of stars
100 or 1000 stars/pc3 in the core of the cluster. In comparison, the stellar density around the Sun is roughly 0.1 stars/pc3. The typical distance between
Globular_cluster
Relation between the ionization state of a gas and the temperature and pressure
enough temperature (here measured in energy units, i.e. keV or J) and/or density, the thermal collisions of the atoms will ionize some of the atoms, making
Saha_ionization_equation
Power per volume
Power density is the amount of power (time rate of energy transfer) per unit volume. It is typically measured in watts per cubic meter (W/m³) and represents
Power_density
Emission nebula in the constellation of Vela
described as a King profile or alternatively as a "core-halo" structure. Stellar density near the center of RCW 36 has been estimated to be approximately 300
RCW_36
Phase in the formation of low-mass stars
Pre-stellar cores are the nurseries of new stars, and are an early phase in the formation of low-mass stars, before gravitational collapse produces a
Pre-stellar_core
Star-containing portion of a galactic halo
A stellar halo is the component of a galaxy's galactic halo that contains stars. The stellar halo extends far outside a galaxy's brightest regions and
Stellar_halo
Measurement of electromagnetic radiation for astronomy
celestial objects. A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance and
Astronomical_spectroscopy
Compact astronomical body
stellar novae, focusing on exceptionally bright ones they called supernovae. Zwicky promoted the idea that supernovae produced stars with the density
Black_hole
Theorem in classical statistical mechanics
ρ(r) is the stellar density at radius r; G represents the gravitational constant and R the total radius of the star. Assuming a constant density throughout
Equipartition_theorem
Strong stellar winds of a galactic scale in size
just galactic wind, is a high velocity stellar wind emanating from either newly formed massive stars, spiral density waves, or as the result of the effects
Galactic_superwind
Physical phenomenon of stars
Stellar mass loss is a phenomenon observed in stars by which stars lose some mass over their lives. Mass loss can be caused by triggering events that
Stellar_mass_loss
Maximum mass of a stable white dwarf star
won the 1983 Nobel prize together with William Alfred Fowler for work on stellar models. Normal stars fuse gravitationally compressed hydrogen into helium
Chandrasekhar_limit
Spherical component of a galaxy
galaxy's stellar mass resides in the stellar halo, meaning its luminosity is much lower than other components of the galaxy. The Milky Way's stellar halo
Galactic_halo
Region of a star
because the density gradient now also depends on concentration gradients. For a polytrope solution with n=3 (as in the Eddington stellar model for radiative
Radiative_zone
Magnetic field generated inside a star
A stellar magnetic field is a magnetic field generated by the motion of conductive plasma inside a star. This motion is created through convection, which
Stellar_magnetic_field
Relative abundance of heavy elements in a star or other astronomical object
nonmetals in chemistry. The presence of heavier elements is the result of stellar nucleosynthesis. The majority of elements that are heavier than hydrogen
Metallicity
Cavity of hot gas blown from a star
A stellar-wind bubble is a cavity light-years across filled with hot gas blown into the interstellar medium by the high-velocity (several thousand km/s)
Stellar-wind_bubble
Astronomical object without the mass to sustain hydrogen fusion
objects into three categories based on their density and phase state: solid, transitional and dark (non-stellar) gaseous. Solid objects include Earth, smaller
Substellar_object
Theory of structure of spiral galaxies
Density wave theory or the Lin–Shu density wave theory is a theory proposed by C.C. Lin and Frank Shu in the mid-1960s to explain the spiral arm structure
Density_wave_theory
stellar velocity, M {\displaystyle M} is the mean stellar mass and n {\displaystyle n} is the stellar density. Normalized for parameters of stellar systems
Gurzadyan–Savvidy_relaxation
Stellar core remnant
dense. When Ernst Öpik estimated the density of visual binary stars in 1916, he found that 40 Eridani B had a density of over 25000 times that of the Sun
White_dwarf
Species of bird found in western North America
the blue jay prevalent on the rest of the continent in those areas. Its density is lower in the central Rocky Mountain region (Montana, Idaho, Wyoming
Steller's_jay
Theory to explain slowing of a star's spin
where the ionized stellar wind stops rotating with the star, or where the magnetic energy density exceeds the kinetic energy density carried by the wind
Magnetic_braking_(astronomy)
Scientific study of celestial objects
of Fixed Stars. The SN 1006 supernova, the brightest apparent magnitude stellar event in the last 1000 years, was observed by the Egyptian Arabic astronomer
Astronomy
BOINC based volunteer computing project researching astronomy
Bibcode:2018PhDT.......235S. hdl:20.500.13015/2346. Weiss, Jake (2018). The Stellar Density of the Major Substructure in the Milky Way Halo (Thesis). ProQuest 2125438843
MilkyWay@home
Type of dense exotic matter in physics
at low temperature. The term is used in astrophysics to refer to dense stellar objects such as white dwarfs and neutron stars, where thermal pressure
Degenerate_matter
the blind and deaf realize true sensory perception. "Physical Sciences: Stellar Evolution" June 4, 1970 (1970-06-04) 23 The latest observations of astronomers
List of The Nature of Things episodes
List_of_The_Nature_of_Things_episodes
Shock wave caused by blowing stellar wind
shock waves in regions where the conditions of density and pressure change dramatically due to blowing stellar wind. Bow shock occurs when the magnetosphere
Bow_shock
Mathematical model in astronomical systems
often used as toy model in N-body simulations of stellar systems. The Plummer 3-dimensional density profile is given by ρ P ( r ) = 3 M 0 4 π a 3 ( 1
Plummer_model
Topics referred to by the same term
similar items or events which is of interest for some question or experiment Stellar population, categorized groups of stars within the Milky Way World population
Population
Rotational center of the Milky Way galaxy
is suspected to have a large population of stellar mass black holes. There are probably around 25,000 stellar mass black holes in the central parsecs of
Galactic_Center
Thermodynamic concept imporant in astrophysics
astrophysics, a polytrope is a thermodynamic system with pressure dependent upon density, leaving only one independent state variable. A polytropic process is intermediate
Polytrope
3847/1538-3881/ad39f0. Sicardy, B.; et al. (2011). "Size, density, albedo and atmosphere limit of dwarf planet Eris from a stellar occultation" (PDF). European Planetary
List of Solar System objects by size
List_of_Solar_System_objects_by_size
Network of automated telescopes
D.; et al. (October 2004). "HATNET Variability Survey in the High Stellar Density "Kepler Field" with Millimagnitude Image Subtraction Photometry". The
HATNet_Project
Property of space that quantifies the magnetic influence at a given location
device for producing a large volume of an almost constant magnetic field Stellar magnetic field – a discussion of the magnetic field of stars Teltron tube –
Magnetic_field
Nuclear fusion reaction
triple-alpha steps are strongly dependent on the temperature and density of the stellar material. The power released by the reaction is approximately proportional
Triple-alpha_process
Moon of 174567 Varda
Ragozzine, Darin (27 May 2026). "Triaxial shapes and densities of G!kún||'hòmdímà, Haumea, and Varda from stellar occultations". The Planetary Science Journal
Ilmarë
Void between celestial bodies
and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium
Outer_space
Star in its early stage of evolution
Young stellar object (YSO) denotes a star in its early stage of evolution. This class consists of two groups of objects: protostars and pre-main-sequence
Young_stellar_object
Nearest star to the Solar System
activity. The star's magnetic field is created by convection throughout the stellar body, and the resulting flare activity generates a total X-ray emission
Proxima_Centauri
Subfield of physics
study of condensed matter at densities common to the deep interiors of giant planets, and hot plasmas typical of stellar interiors. This multidisciplinary
High_energy_density_physics
Hypothetical astronomical object
hole's event horizon, created when the energy density of a collapsing star reaches the Planck energy density. Under these conditions, assuming gravity and
Planck_star
- Hubble constant Λ - cosmological constant Ω - density parameter ρ - density ρc - critical density z - redshift Distance description for orbital and
List of common astronomy symbols
List_of_common_astronomy_symbols
System of interacting nucleons
Rabhi; C. Providencia; J. Da Providencia (2008). "Stellar matter with a strong magnetic field within density-dependent relativistic models". J Phys G. 35 (12)
Nuclear_matter
Everything in space and time
helium, through stellar nucleosynthesis. The universe contains a mysterious energy—possibly a scalar field—called dark energy, the density of which does
Universe
STELLAR DENSITY
STELLAR DENSITY
Girl/Female
Indian
Truly, Kind person, Beautiful
Female
Romanian
Romanian name derived from Latin stella, STELA means "star."
Surname or Lastname
English
English : occupational name from Old French telier ‘weaver’, ‘linen-weaver’.German : variant of Tell 2 and 3.Dutch : occupational name for a teller, a marketplace official.Jewish (Ashkenazic) : either a metonymic occupational name for a dish maker or a nickname, from German Teller, Yiddish teler ‘plate’.Catalan : from a derivative of Tell 4.This name is recorded in Beverwijck in New Netherland (Albany, NY) in the mid 17th century.
Surname or Lastname
German and Jewish (Ashkenazic)
German and Jewish (Ashkenazic) : occupational name for a joiner, from a word of Slavic origin. Compare Polish Stolarz.German (Switzerland and Upper Rhine) : habitational name for someone from a place called Stolle, near Zurich (now called Stollen).English : occupational name for a stole maker, from an agent derivative of Middle English stole ‘stole’.
Girl/Female
Latin Spanish American French
Star.
Surname or Lastname
English and Scottish
English and Scottish : topographic name, a variant of Sell 1.English and Scottish : occupational name for a saddler, from Anglo-Norman French seller (Old French sellier, Latin sellarius, a derivative of sella ‘seat’, ‘saddle’).English and Scottish : metonymic occupational name for someone employed in the cellars of a great house or monastery, from Anglo-Norman French celler ‘cellar’ (Old French cellier), or a reduction of the Middle English agent derivative cellerer.English and Scottish : occupational name for a tradesman or merchant, from an agent derivative of Middle English sell(en) ‘to sell’ (Old English sellan ‘to hand over, deliver’).German : probably a habitational name from a place named Sella near Hoyerswerda.
Surname or Lastname
English and South German
English and South German : occupational name for a reciter, from an agent derivative of Middle English spell(en), Middle High German spellen ‘to tell or relate’. In the case of the English surname there has probably been some confusion with Spiller.German : habitational name for someone from Spelle near Rheine.Variant of Spiller 1.
Surname or Lastname
English
English : nickname from Middle English snell ‘quick’, ‘lively’ + the French pejorative suffix -ard.
Surname or Lastname
German
German : nickname for a calm individual, variant of Still 1.English : topographic name for someone who lived by a fish trap in a river (see Still 2).German : habitational name from Still in Alsace.
Female
English
English name derived from Latin stella, STELLA means "star."
Girl/Female
Muslim/Islamic
Truely Kind person , Beautiful
Male
Scottish
Modern form of Scottish Eallair, ELLAR means "superior of a church cell."
Surname or Lastname
English
English : byname for a valiant or resolute person, from a reduced pronunciation of Middle English stalward, stalworth ‘stalwart’ (an Old English compound of stǣl ‘place’ + wierðe ‘worthy’).
Girl/Female
Latin Swedish American French
Star.
Male
Romanian
Romanian form of Greek Stylianos, STELIAN means "pillar."
Girl/Female
Arabic, Muslim
Little Mountain; Truly; Kind Person; Beautiful
Girl/Female
Indian, Tamil
Loveable
Girl/Female
Muslim
Truly, Kind person, Beautiful
Female
Esperanto
Esperanto name STELARA means "like a constellation."Â
Girl/Female
Latin
From Atella.
STELLAR DENSITY
STELLAR DENSITY
Male
Egyptian
, an Egyptian deity.
Girl/Female
Indian, Tamil
Goddess Saraswati
Boy/Male
Australian, Bengali, Hindu, Indian
Fighter
Female
Italian
Diminutive form of Italian Giulia, GIULIETTA means "descended from Jupiter (Jove)."
Female
English
 Variant spelling of English Rebekah, REBECKA means "ensnarer." Compare with another form of Rebecka.
Girl/Female
German, Greek, Swedish
Harvester
Girl/Female
Spanish
Earth.
Girl/Female
Tamil
Sphuritha | ஸà¯à®ªà¯à®°à¯€à®¤à®¾
Shining
Surname or Lastname
Jewish (Ashkenazic)
Jewish (Ashkenazic) : metronymic from the Yiddish female personal name brayne (a back formation of the Yiddish female personal name brayndl, which is a diminutive of Yiddish broyn ‘brown’) + the genitive ending -s.English : variant of Brine.
Boy/Male
Tamil
Lord Shiva
STELLAR DENSITY
STELLAR DENSITY
STELLAR DENSITY
STELLAR DENSITY
STELLAR DENSITY
n.
Same as Stealer.
a.
Minutely stellate.
a.
Of or pertaining to stars; astral; as, a stellar figure; stellary orbs.
n.
A wood seller.
n.
The rytina; -- called also stellerine.
n.
Alt. of Shellac
v. t.
To cover, or provide with, a sollar.
a.
Consisting of, or proceeding from, the stars; stellar; stellary; as, starry light; starry flame.
a.
Alt. of Stellary
n.
One who, or that which, shells; as, an oyster sheller; a corn sheller.
a.
Full of stars; starry; as, stellar regions.
n.
One who tells stories; a narrator of anecdotes,incidents, or fictitious tales; as, an amusing story-teller.
pl.
of Stela
n.
A fortune teller.
a.
Full of unpropitious stellar influences; unpropitious; ill-boding.
a.
See Stilar.
a.
Of or pertaining to Atella, in ancient Italy; as, Atellan plays; farcical; ribald.
n.
A farcical drama performed at Atella.
n.
A fortune teller.
n.
The space or storerooms of a cellar; a cellar.