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Innermost layer(s) of a planet
A planetary core consists of the innermost layers of a planet. Cores may be entirely liquid, or a mixture of solid and liquid layers as is the case in
Planetary_core
Innermost part of Earth, a solid ball of iron-nickel alloy
(1997). "Hydrostatic flattening, core structure, and translational mode of the inner core". Physics of the Earth and Planetary Interiors. 99 (3–4): 195–206
Earth's_inner_core
Type of emission nebula created by dying red giants
energetic ultraviolet radiation from the exposed hot luminous core, called a planetary nebula nucleus (P.N.N.), ionizes the ejected material. Absorbed
Planetary_nebula
body, being composed of a geochemically distinct crust, mantle, and planetary core. This structure is believed to have resulted from the fractional crystallization
Internal structure of the Moon
Internal_structure_of_the_Moon
2025 video game
2. The player controls the gorilla Donkey Kong, who ventures to the planetary core with the teenage Pauline. Similar to EPD's Super Mario Odyssey (2017)
Donkey_Kong_Bananza
Fluid layer between Earth's solid inner core and its mantle
S2CID 128528504. Young, C J; Lay, T (1987). "The Core-Mantle Boundary". Annual Review of Earth and Planetary Sciences. 15 (1): 25–46. Bibcode:1987AREPS..15
Earth's_outer_core
Group of alloys
nickel (Ni) and iron (Fe). It is the main constituent of the "iron" planetary cores and iron meteorites. In chemistry, the acronym NiFe refers to an iron–nickel
Iron–nickel_alloy
Astrogeological concept
In planetary science, planetary differentiation is the process by which the chemical elements of a planetary body accumulate in different areas of that
Planetary_differentiation
Topics referred to by the same term
part of an anticline or syncline Planetary core, the center of a planet Earth's inner core Earth's outer core Stellar core, the region of a star where nuclear
Core
Australian animated web series
harvest it for natural resources. The planet suddenly suffers a catastrophic core collapse, wiping out all biological life on the planet, including humans
Murder_Drones
Interior of the earth
process called planetary differentiation (see also the iron catastrophe), while less-dense materials would have migrated to the crust. The core is thus believed
Internal_structure_of_Earth
Reversal of direction of Earth's magnetic field
molten iron in the planetary core generates electric currents which in turn give rise to magnetic fields. In simulations of planetary dynamos, reversals
Geomagnetic_reversal
Second planet from the Sun
Earth's. The predicted values for the moment of inertia based on planetary models suggest a core radius of 2,900–3,450 km. There is now an estimate of 3,500 km
Venus
Large area of molten rock on the surface of a planet
impacts with other planetary bodies. Magma oceans are integral parts of planetary formation as they facilitate the formation of a core through metal segregation
Magma_ocean
Different forms of the element iron
phases of iron are important as models for the solid parts of planetary cores. The inner core of the Earth is generally assumed to consist essentially of
Allotropes_of_iron
Exoplanet (chthonian planet)
Lopez, Théo A.; Adibekyan, Vardan; et al. (June 1, 2020). "A remnant planetary core in the hot-Neptune desert". Nature. 583 (7814): 39–42. arXiv:2003.10314
TOI-849_b
Popular theme in science fiction
a hollow Earth or Earth's molten core. Planetary scientist David J. Stevenson suggested sending a probe to the core as a thought experiment. Humans have
Travel_to_the_Earth's_center
Fictional characters
that can be used to "stabilize planetary cores" to prevent a world from exploding like Krypton did. The rare, planetary core stabilizing metal, is only available
Omega_Men
Gas giants with their atmospheric layers stripped
conf..582O. Armstrong DJ, Lopez TA, Zhan Z (June 1, 2020). "A remnant planetary core in the hot-Neptune desert". Nature. 583 (7814): 39–42. arXiv:2003.10314
Chthonian_planet
Astronomical theory about the Solar System
explain the formation and evolution of the Solar System (as well as other planetary systems). It suggests the Solar System was formed from gas and dust orbiting
Nebular_hypothesis
Type of giant planet
ice giants in the Solar System: Uranus and Neptune. In astrophysics and planetary science, the term "ice" refers to volatile chemical compounds with freezing
Ice_giant
Science of planets and planetary systems
and moons, from their core to their magnetosphere. The best-known research topics of planetary geology deal with the planetary bodies in the near vicinity
Planetary_science
1994 video game
oppressive enemy robots from the surface of the planet and obliterating the planetary core in order to destroy the infested planet entirely. Geograph Seal garnered
Geograph_Seal
2024 expansion of Destiny 2
Conduit, and Core—where a fireteam battled Vex, Fallen, Shadow Legion Cabal, and Taken to progress from the surface of Nessus to its planetary core; and Act
Destiny_2:_The_Final_Shape
Geochronological radiometric dating method using radioactive decay of hafnium-182
been used to suggest that Mars is a primordial planetary embryo. For Earth, models of accretion and core formation are strongly dependent on how much giant
Hafnium–tungsten_dating
Astronomical phenomenon
Planetary migration occurs when a planet or other body in orbit around a star interacts with a disk of gas or planetesimals, resulting in the alteration
Planetary_migration
Dwarf planet in the asteroid belt
may have been sufficient to allow Ceres to differentiate into a rocky planetary core and icy mantle, or even a liquid water ocean, soon after its formation
Ceres_(dwarf_planet)
Experiment measuring the force of gravity (1797–1798)
variations of it. Cavendish's result provided additional evidence for a planetary core made of metal, an idea first proposed by Charles Hutton based on his
Cavendish_experiment
Size-based definition of celestial objects
A planetary-mass object (PMO), planemo, or planetary body (sometimes referred to as a world) is, by geophysical definition of celestial objects, any celestial
Planetary-mass_object
Mecha-based video game series
Armored Core (Japanese: アーマード・コア, Hepburn: Āmādo Koa) is a third-person shooter mecha video game series developed by FromSoftware. The series centers on
Armored_Core
Accumulation of particles into a massive object by gravitationally attracting more matter
the core of giant planets. If the planetesimals formed via the gravitational collapse of local concentrations of pebbles, their growth into planetary embryos
Accretion_(astrophysics)
Extrasolar planet in the constellation Hercules
(relative to mass and incoming heat) that suggests an exceptionally large planetary core. As its star is evolved to such a stage and the planet is so close,
HD_149026_b
Large, round non-stellar astronomical object
Each therefore has a differentiated interior consisting of a dense planetary core surrounded by a mantle that either is or was a fluid. The terrestrial
Planet
Hypothesis of the formation of the Moon
gravity to re-fuse with Earth, with less remaining metallic iron than other planetary bodies. The Moon is depleted in volatile substances compared to Earth
Giant-impact_hypothesis
2010-02-04. Ayliffe, B.; Bate, M. R. (2009). "Gas accretion on to planetary cores: three-dimensional self-gravitating radiation hydrodynamical calculations"
Formation and evolution of the Solar System
Formation_and_evolution_of_the_Solar_System
Hypothetical planet with no metallic core
planet is a hypothetical type of terrestrial planet that has no metallic core and is thus effectively a giant rocky mantle. It can be formed in cooler
Coreless_planet
Life that does not originate on Earth
habitable back then, and life on Mars may have been possible. But when the planetary core ceased to generate a magnetic field, solar winds removed the atmosphere
Extraterrestrial_life
Layer inside a planetary-mass object
A mantle is a layer inside a planetary body bounded below by a core and above by a crust. Mantles are made of rock or ices, and are generally the largest
Mantle_(geology)
Reconnaissance mission of the main belt asteroid 16 Psyche
space mission launched on October 13, 2023, to explore the origin of planetary cores by orbiting and studying the metallic asteroid 16 Psyche beginning
Psyche_(spacecraft)
Known extent to which a planet is suitable for life
Planetary habitability is a measure used in astrobiology to characterize a planet's or a natural satellite's potential to develop and sustain an environment
Planetary_habitability
Body of interstellar clouds
in the center of the Crab Nebula and its core is now a neutron star. Still other nebulae form as planetary nebulae. This is the final stage of a low-mass
Nebula
A planetary surface is where the solid or liquid material of certain types of astronomical objects contacts the atmosphere or outer space. Planetary surfaces
Planetary_surface
Atmosphere of a protoplanet
atmosphere can also be initiated from outgassed volatiles from the planetary core and mantle like water vapor and carbon dioxide or from volatiles contributed
Primary_atmosphere
Star in the constellation Taurus
white dwarf accreted a massive differentiated rocky body with a large planetary core. Until 2021 it was the oldest and coldest white dwarf known to host
LSPM_J0207+3331
Hypothetical gas giant in the Oort cloud
added mass is compensated for by increasing degeneracy pressure in the planetary core. For example, HD 17156 b is 3 MJ with a radius of 96% of Jupiter and
Tyche_(hypothetical_planet)
NASA mission to Mercury
Barry Mauk / APL Measured the gravity of Mercury and the state of the planetary core by utilizing the spacecraft's positioning data. Objectives: Determine
MESSENGER
2013 film by Zack Snyder
The planet Krypton is destabilizing due to reckless mining of the planetary core. The Kryptonian Council ignores the warnings of renowned scientist Jor-El
Man_of_Steel_(film)
Set of non-stellar objects in orbit around a star
A planetary system consists of a set of non-stellar bodies which are gravitationally bound to and in orbit of a star or star system. Generally speaking
Planetary_system
Radioactive isotope of potassium
evidence that potassium is a substantial radioactive heat source in planetary cores". Nature. 423 (6936): 163–5. Bibcode:2003Natur.423..163M. doi:10.1038/nature01560
Potassium-40
Planet not gravitationally bound to a star
free-floating planet (FFP) or an isolated planetary-mass object (iPMO), is an interstellar object of planetary mass which is not gravitationally bound to
Rogue_planet
Layer of gases surrounding an astronomical body held by gravity
primarily of refractory materials with few volatiles. Further from the star, planetary embryos are created from accumulation of volatiles up to around ten times
Atmosphere
Video game series
speed, density, composition (for example change the components of the planetary core like silicates, helium or iron), influence life likelihood, as well
Universe_Sandbox
Extrasolar planet
cannot distinguish between minerals, it can at least exclude iron-rich planetary core material. The spectrum also shows an unexpected feature at 5 μm, which
K2-22b
DLC for the video game Destiny 2 released from 2017 to 2026
fireteam of Guardians venture deep into the Leviathan's core to confront Argos, Planetary Core, the Vex Mind which was responsible for the transformation
Destiny 2 post-release content
Destiny_2_post-release_content
Supermassive Neptune-sized planet
; Lopez, Théo A.; Adibekyan, Vardan; et al. (June 2020). "A remnant planetary core in the hot-Neptune desert". Nature. 583 (7814): 39–42. arXiv:2003.10314
TOI-1853_b
Structures of the Earth's mantle
characteristic structures within the lowermost mantle, above the Earth's outer core. These provinces are characterized by slow shear wave velocities appearing
Large low-shear-velocity provinces
Large_low-shear-velocity_provinces
Chemical element with atomic number 79 (Au)
almost all of the gold present in the early Earth probably sank into the planetary core. Therefore, as hypothesized in one model, most of the gold in the Earth's
Gold
Ringed dwarf planet in the Kuiper belt
Quaoar led researchers to hypothesize that the object might be a rocky planetary core exposed by a large impact event, but these hypotheses have since become
Quaoar
Hypothesis that complex extraterrestrial life is improbable and extremely rare
In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as
Rare_Earth_hypothesis
Limits to safe impact on the Earth ecology
Planetary boundaries are a framework to describe limits to the impacts of human activities on the Earth system. Beyond these limits, the environment may
Planetary_boundaries
Video game series
"Wills of the Planet" that created the entirety of Ar Ciel from the Planetary Core where they reside, and the second are the "Reyvateil Origins" that are
Ar_Tonelico
DC Comics fictional supervillain
suffers from the same planetary instability that destroyed Krypton. While creating a "Neutrarod" tower to stabilize the planetary core, Luthor's pathological
Lex_Luthor
Largest moon of Jupiter
(2002). "Internal structure and mechanism of core convection on Ganymede" (PDF). Lunar and Planetary Science. XXXIII: 1380. Bibcode:2002LPI....33.1380H
Ganymede_(moon)
This is a list of exoplanets and planetary debris disks around white dwarfs. Circumbinary exoplanets found with eclipse timing variations are sometimes
List of exoplanets and planetary debris around white dwarfs
List_of_exoplanets_and_planetary_debris_around_white_dwarfs
Model in planetary science
model of planetary science that describes the first stage of planetary differentiation and core formation. According to this model, a planetary body is
Rain-out_model
Separation of materials resulting in a distinct planetary mantle and core
Shun-ichiro (1997). "Core formation and chemical equilibrium in the Earth - I. Physical considerations". Physics of the Earth and Planetary Interiors. 100 (1–4):
Core–mantle_differentiation
Vibrational energy transfer in Earth or other planetary body
mechanical wave of acoustic energy that travels through the Earth or another planetary body. It can result from an earthquake (or generally, a quake), volcanic
Seismic_wave
Planetary-mass bodies that are also natural satellites
A planetary-mass moon is a planetary-mass object that is a natural satellite of another non-stellar celestial object. Because of their mass, these moons
Planetary-mass_moon
16th episode of the 4th season of Adventure Time
Earth's planetary core where Flame Princess will be thrown around by gravity until Flame Princess melts the Earth inside the planetary core. The episode
Burning_Low
Type of iron meteorite
meteorite groups. Most iron meteorites are derived from the metallic planetary cores of their respective parent bodies, but in the case of the IIABs the
IIAB_meteorites
Stellar core remnant
creating strong stellar winds. The ejected mass forms a planetary nebula leaving behind a core, which is the remnant white dwarf. A white dwarf radiates
White_dwarf
Fictional extraterrestrial species in Star Trek
space mining vessel, Narada, Nero created a singularity in Vulcan's planetary core as part of his quest to avenge the destruction of Romulus, which Spock
Vulcan_(Star_Trek)
Central region of the Sun
The solar core is the hot, dense region at the center of the Sun where energy is generated by nuclear fusion. It is considered to extend from the Sun's
Solar_core
Video game
as a separate program. Bossa Studios had hinted at the presence of a planetary core miles beneath the orbiting clouds, but any player attempting to travel
Worlds_Adrift
Changes to stars over their lifespans
exhausted its nuclear fuel, its core collapses into a dense white dwarf and the outer layers are expelled as a planetary nebula. Stars with around ten or
Stellar_evolution
First planet from the Sun
a solid, metallic outer core layer, a deeper liquid core layer, and a solid inner core. The composition of the iron-rich core remains uncertain, but it
Mercury_(planet)
Deprecated term formerly used in meteoritics
Iron meteorites are derived from planetary cores of asteroids and planetesimals. The formation of metallic cores depends on the heat of radionuclides
Nonmagmatic_meteorite
Public university in Tempe, Arizona, US
deep space mission to Psyche, a metal asteroid believed to be a former planetary core. The $450 million project is the first NASA mission led by the university
Arizona_State_University
Prevention of interplanetary biological contamination
Planetary protection is a guiding principle in the design of an interplanetary mission, aiming to prevent biological contamination of both the target
Planetary_protection
2023 video game
Armored Core VI: Fires of Rubicon is a 2023 mecha-based vehicular combat game developed by FromSoftware and published by Bandai Namco Entertainment. A
Armored Core VI: Fires of Rubicon
Armored_Core_VI:_Fires_of_Rubicon
Planet that is composed primarily of silicate rocks or metals
comparable mass. Mercury in the Solar System has a metallic core equal to 60–70% of its planetary mass, and is sometimes called an iron planet, though its
Terrestrial_planet
planetesimals during the early bombardment phase, and energy released by the planetary core forming. Outgassing from crustal rocks gives Earth a reducing atmosphere
Timeline_of_Earth
Heterogeneous class of stars with unusual spectra
loss. A separate group of stars with WR spectra are the central stars of planetary nebulae (CSPNe), post-asymptotic giant branch stars that were similar
Wolf–Rayet_star
Sixth planet from the Sun
Saturn all rise steadily toward the core, which causes hydrogen to be a metal in the deeper layers. Standard planetary models suggest that the interior of
Saturn
Distribution of mass in a celestial body
The quantity is a useful indicator of the presence and extent of a planetary core, because a greater departure from the uniform-density value of 0.4 conveys
Moment_of_inertia_factor
Exoplanet internal structure
than expected. The Solar System has a variety of planetary interiors; Earth has an inner and outer core (reaching to approximately 55% of Earth's radius)
Exoplanet_interiors
Video game series by Bungie
fireteam of Guardians venture deep into the Leviathan's core to eliminate Argos, Planetary Core, the Vex Mind which was responsible for the transformation
Destiny_(video_game_series)
Grouping of evolved cool luminous stars
the core regions remain, they evolve further into short-lived protoplanetary nebula. The final fate of the AGB envelopes are represented by planetary nebulae
Asymptotic_giant_branch
Hypothetical type of nuclear reaction
the possible existence of fusion involving hydrogen isotopes in a planetary core. In his original paper on this subject with Clinton Van Siclen, submitted
Cold_fusion
Large self-illuminated object in space
dredged up from the core. Therefore, the planetary nebula is enriched with elements like carbon and oxygen. Ultimately, the planetary nebula disperses,
Star
Phase of hydrogen
diagram of Jupiter showing a model of the planet's interior, with a rocky core overlaid by a deep layer of liquid metallic hydrogen (shown as magenta) and
Metallic_hydrogen
Planetary system consisting of the Sun and objects orbiting it
planets, of which Earth is one. The Solar System is an isolated single-star planetary system (not part of a larger star system) within the Milky Way Galaxy
Solar_System
Long-term future of planet Earth
its core to carbon, the Sun will begin to collapse again, evolving into a compact white dwarf star after ejecting its outer atmosphere as a planetary nebula
Future_of_Earth
Records of Earth's development
Anette; Kleine, Thorsten; Mezger, Klaus (4 July 2003). "Evolution of Planetary Cores and the Earth-Moon System from Nb/Ta Systematics". Science. 301 (5629):
History_of_Earth
Discontinuity where the bottom of the planet's mantle meets the outer layer of the core
The core–mantle boundary (CMB) of Earth lies between the planet's silicate mantle and its liquid iron–nickel outer core, at a depth of 2,891 km (1,796 mi)
Core–mantle_boundary
Astrophysical phenomenon
a white dwarf, or the sudden gravitational collapse of a massive star's core. In the re-ignition of a white dwarf, the object's temperature is raised
Supernova
Sun-like star in the constellation of Gemini
than the age of the planetary system, indicate that it has already lost its primordial atmosphere, and could be a rocky planetary core. However, if HD 63433
HD_63433
2014 video game
corp (home of the whale dental bleaching laser, chromosomic DRM and Planetary Core Replacement Device) – and the planet is now a mess. Someone didn't read
McDroid
Seismic wave velocity variation
distribution and variation of seismic wave speeds within Earth's and other planetary bodies' subsurface. It is reflective of subsurface properties such as
Seismic_velocity_structure
Physics term for multiple concepts
environments that exist at high pressure, such as the deep ocean or inside planetary cores. The materials have potentially useful properties. For instance, Na
Exotic_matter
PLANETARY CORE
PLANETARY CORE
Girl/Female
English American Irish
From the round hill; seething pool; or ravine.
Girl/Female
Muslim
The innermost essence, Core, Gist
Female
Irish
Irish form of French Corinne, COREEN means "maiden."
Girl/Female
English American Greek
This name was invented by British writer Marie Corelli, who gave it to her heroine in her novel...
Girl/Female
Muslim
The innermost essence, Core, Gist
Girl/Female
Irish
Maiden.
Girl/Female
Greek French
Maiden.
Male
English
English name, possibly of Irish Gaelic origin, from a place name COREY means "deep hollow, ravine."
Girl/Female
Indian
The innermost essence, Core, Gist
Surname or Lastname
English, Irish, and German
English, Irish, and German : variant of Korell.
Surname or Lastname
English
English : from the Old Norse personal name Kori, which is of uncertain meaning.Northern Irish : variant of Curry.
Boy/Male
American, British, English, Irish
From the Ravine; Hill Hollow; Variant of Corey Hill Hollow
Girl/Female
Indian
The innermost essence, Core, Gist
Girl/Female
Greek English French Irish
Maiden.
Boy/Male
Scottish American Gaelic English Anglo Saxon Irish
Seething pool.
Surname or Lastname
English
English : variant spelling of Corey.
Surname or Lastname
Irish
Irish : variant of Curley.English : habitational name from Corley in Warwickshire or Coreley in Shropshire, both named with Old English corna, a metathesized form of crona, genitive plural of cron, cran ‘crane’ + lēah ‘woodland clearing’.
Girl/Female
Irish
Maiden.
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : habitational name from Corbridge in Northumberland, named in late Old English as Corebricg ‘bridge near Corchester’, from a shortened form of Corstopitum, the Celtic name of Corchester + Old English brycg ‘bridge’.
Surname or Lastname
English
English : unexplained.Southern Italian : from a short form of the personal names Boncore, literally ‘good heart’, a medieval omen name, or Belcore.
PLANETARY CORE
PLANETARY CORE
Boy/Male
Indian, Punjabi, Sikh
Always in Bliss
Girl/Female
Celtic
Splendid or strong.
Girl/Female
Hindu
Boy/Male
English
Hilly.
Boy/Male
Welsh
Dwells in the woods.
Boy/Male
Irish
Majestic.
Boy/Male
Sikh
Gods light, Strong
Boy/Male
Muslim
Old Arabic name, Habitation
Boy/Male
American, Anglo, Australian, British, Chinese, English, French, Jamaican
To Cut; Tailor; One who Cuts Cloth; Cutter of Cloth
Girl/Female
Indian
Pleasant smell, Sweet smell, Fragrance
PLANETARY CORE
PLANETARY CORE
PLANETARY CORE
PLANETARY CORE
PLANETARY CORE
n.
The heart or inner part of a thing, as of a column, wall, rope, of a boil, etc.; especially, the central part of fruit, containing the kernels or seeds; as, the core of an apple or quince.
a.
Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year.
n.
The most important part of a thing; the essence; as, the core of a subject.
a.
Under the dominion or influence of a planet.
a.
Caused by planets.
n.
The center or inner part, as of an open space; as, the core of a square.
v. t.
To take out the core or inward parts of; as, to core an apple.
a.
Having the nature of a planet; erratic; revolving; wandering.
a.
In the direction of the general planetary motion, or from west to east; in the order of the signs; not retrograde; -- said of the motion of a celestial body.
a.
Consisting of planets; as, a planetary system.
n.
A European lake whitefish (Coregonus Willughbii, or C. Vandesius) native of certain lakes in Scotland and England. It is regarded as a delicate food fish. Called also vendis.
n.
A lake whitefish (Coregonus quadrilateralis), less compressed than the common species. It is very abundant in British America and Alaska.
a.
Having reference to the placenta; as, the placentary system of classification.
n.
A whitefish (Coregonus tullibee) found in the Great Lakes of North America; -- called also mongrel whitefish.
a.
Of or pertaining to a plane.
n.
That which cores; an instrument for coring fruit; as, an apple corer.
n.
Same as Coreopsis.
n.
A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet relative to the earth.
a.
Of or pertaining to the sole of the foot; as, the plantar arteries.
v. t.
To form by means of a core, as a hole in a casting.