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Fluid layer between Earth's solid inner core and its mantle
Earth's outer core is a fluid layer about 2,260 km (1,400 mi) thick, composed of mostly iron and nickel that lies above Earth's solid inner core and below
Earth's_outer_core
liquid outer core, and a solid, rigid inner core. Its chemical structure is of a silicate crust, a ferromagnesian mantle, and an iron-nickel core whose
Internal_structure_of_Earth
Innermost part of Earth, a solid ball of iron-nickel alloy
Simon-Glatzel equation. Earth was discovered to have a solid inner core distinct from its molten outer core in 1936, by the Danish seismologist Inge Lehmann's study
Earth's_inner_core
2003 film by Jon Amiel
the U.S. government plans to detonate nuclear weapons within the Earth's outer core to restart the rotation. Zimsky's former partner, Dr. Ed "Braz" Brazzelton
The_Core
Innermost layer(s) of a planet
outer core, can be determined: 85% Fe, 5% Ni, 0.9% Cr, 0.25% Co, and all other refractory metals at very low concentration. This leaves Earth's core with
Planetary_core
Topics referred to by the same term
Planetary core, the center of a planet Earth's inner core Earth's outer core Stellar core, the region of a star where nuclear fusion takes place Solar core Core
Core
mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo
Earth's_magnetic_field
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
Vibrational energy transfer in Earth or other planetary body
to increase with depth through Earth's crust and mantle, but drops sharply going from the mantle to Earth's outer core. Earthquakes create distinct types
Seismic_wave
Mechanism by which a celestial body generates a magnetic field
explanation of the Earth's magnetism, proposed that this magnetic field resulted from electric currents induced in the fluid outer core of the Earth. He revealed
Dynamo_theory
Large area of molten rock on the surface of a planet
Today Earth's outer core is a liquid layer about 2,260 km (1,400 mi) thick, composed mostly of molten iron and molten nickel that lies above Earth's solid
Magma_ocean
1930 novel by Edgar Rice Burroughs
Tarzan at the Earth's Core is a novel by American writer Edgar Rice Burroughs, serialized in September 1929 to March 1930, the thirteenth in his series
Tarzan_at_the_Earth's_Core
Poles of a best fit to the Earth's field
pass through Earth's center. Owing to the motion of fluid in the Earth's outer core, the magnetic field is constantly moving, in what is called geomagnetic
Geomagnetic_pole
Structures of the Earth's mantle
above the Earth's outer core. These provinces are characterized by slow shear wave velocities appearing in seismic tomography assays of deep Earth. The two
Large low-shear-velocity provinces
Large_low-shear-velocity_provinces
Geological phenomenon resulting in shifts in the magnetic poles
variations in the flow of molten iron in Earth's outer core, resulting in changes in the orientation of Earth's magnetic field, and hence the position of
Polar_drift
1914 book by Edgar Rice Burroughs
At the Earth's Core is a 1914 fantasy novel by American writer Edgar Rice Burroughs, the first in his series about the fictional "Hollow Earth" land of
At_the_Earth's_Core_(novel)
Seismic wave velocity variation
and reveal information about the Earth's rigidity and internal composition, including the discovery of the outer core's liquid state since they cannot pass
Seismic_velocity_structure
Concept in geodynamics
inner and outer core. However, the hypothesis of super-rotation is disputed in the later seismic studies. The seismic support of inner core super-rotations
Inner_core_super-rotation
Fields of natural science related to Earth
mixture of molten iron and nickel in Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo
Earth_science
2019 video game
Outer Wilds is a 2019 action-adventure game developed by Mobius Digital and published by Annapurna Interactive. The game follows the player character
Outer_Wilds
Earth's magnetic pole in the Northern Hemisphere
Earth's magnetic north pole. The north magnetic pole moves over time according to magnetic changes and flux lobe elongation in the Earth's outer core
North_magnetic_pole
Long-term future of planet Earth
iron-rich core region of the Earth is divided into a 2,440 km (1,520 mi) diameter solid inner core and a 6,960 km (4,320 mi) diameter liquid outer core. The
Future_of_Earth
Type of exoplanet larger than Earth
from Earth's; theoretical models for super-Earths provide four possible main compositions according to their density: low-density super-Earths are inferred
Super-Earth
This page is a list of the episodes of The Outer Limits, a 1995 science fiction/dark fantasy television series. The series was broadcast on Showtime from
List of The Outer Limits (1995 TV series) episodes
List_of_The_Outer_Limits_(1995_TV_series)_episodes
Layer of silicate rock
Earth's mantle is a layer of silicate rock between the crust and the outer core. It has a mass of 4.01×1024 kg (8.84×1024 lb) and makes up 86% of the
Earth's_mantle
Physics of the Earth and its vicinity
Electromagnetic waves occur in the ionosphere and magnetosphere as well as in Earth's outer core. Dawn chorus is believed to be caused by high-energy electrons that
Geophysics
Boundary between Earth's core and mantle
between two sections of the earth's interior, known as the lower mantle (which is considered solid) and the underlying outer core (believed to be molten)
Gutenberg_discontinuity
Central region of the Sun
plasma drops from about 70% hydrogen by mass at the outer core, to 34% hydrogen at the center. The core contains 34% of the Sun's mass, but only 3% of the
Solar_core
ESA's space program to study Earth's magnetic field
from the Swarm satellites, they had discovered a new feature in the Earth's outer core, a jet-stream of rapidly moving liquid iron moving at around 50 km
Swarm_(spacecraft)
Arrowverse crossover event
Earths: Part Two" at IMDb "Crisis on Infinite Earths: Part Three" at IMDb "Crisis on Infinite Earths: Part Four" at IMDb "Crisis on Infinite Earths:
Crisis on Infinite Earths (Arrowverse)
Crisis_on_Infinite_Earths_(Arrowverse)
Accounting of heat created within the Earth
the core is necessary for maintaining the convecting outer core and the geodynamo and Earth's magnetic field; therefore primordial heat from the core enabled
Earth's_internal_heat_budget
light alloying elements in the Earth's outer core and how are they distributed? What are the heterogeneities of the core and their dynamical significance
List of unsolved problems in geoscience
List_of_unsolved_problems_in_geoscience
Overview of and topical guide to the Solar System
characteristics of the Earth Figure of the Earth Structure of the Earth Earth's crust Earth's mantle Earth's outer core Earth's inner core Earth's magnetic field
Outline_of_the_Solar_System
Study of the transformations involving carbon within the systems of the Earth
minerals, and also exists in the Earth's outer core in solution with iron, and may also be present in the inner core. Carbon can form a huge variety stable
Geochemistry_of_carbon
Fictional Hollow Earth invented by Edgar Rice Burroughs
unidentified outer world equivalent. Brachiosaurus — Pellucidarian name inknown. Cave bear (Ryth) — It first appeared in At the Earth's Core. Cave hyena
Pellucidar
Planetary system consisting of the Sun and objects orbiting it
in the core. The Sun is not massive enough to commence the fusion of heavier elements, and nuclear reactions in the core will dwindle. Its outer layers
Solar_System
Area not reached by seismic waves from an earthquake
zones. The earth is made up of different structures: the crust, the mantle, the inner core and the outer core. The crust, mantle, and inner core are typically
Shadow_zone
Third planet from the Sun
Earth has a liquid outer core that generates a magnetosphere capable of deflecting most of the destructive solar winds and cosmic radiation. Earth has
Earth
Theories explaining the formation of Earth's Moon
and uranium on the equatorial plane and at the boundary between the Earth's outer core and mantle. If the concentrations of these radioactive elements were
Origin_of_the_Moon
Small deviation in the Earth's axis of rotation relative to the solid earth
due to changes in the mass distribution or angular momentum of the Earth's outer core, atmosphere, oceans, or crust (from earthquakes), for a long time
Chandler_wobble
Barrier islands in North Carolina and Virginia, United States
infrastructure and property. The term "Outer Banks" refers to the islands, shoals, and spits from Ocracoke northward, also includes Core Banks, and is frequently abbreviated
Outer_Banks
Hypotheses for the possible sources of the water on Earth
delivered to Earth from the outer Solar System later in its history. Recent research, however, indicates that hydrogen inside the Earth played a role
Origin_of_water_on_Earth
Change in the Earth's magnetic field
field is reversed only within the liquid outer core, and complete reversals would occur when the outer and inner core are both affected. The most popular hypothesis
Geomagnetic_excursion
Sensory organs in some fish that detect electrical fields
Earth's outer core generates a magnetic field that fluctuates very little over the lifespan of many species, but will vary distinctly across Earth's surface
Ampullae_of_Lorenzini
French seismologist
understanding of the structure of the liquid Earth's outer core and solid inner core, in relation with Earth evolution. She has also made important contributions
Annie_Souriau
Danish seismologist (1888–1993)
for her discovery in 1936 of the solid inner core that exists within the molten outer core of the Earth. She also discovered the seismic discontinuity
Inge_Lehmann
Void between celestial bodies
Outer space, or simply space, is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle
Outer_space
Dynamics of naturally occurring flows
convection, can occur. Convection in the Earth's outer core drives the geodynamo that is the source of the Earth's magnetic field. In the ocean, convection
Geophysical_fluid_dynamics
Planet much larger than the Earth
hypothesized that mega-Earths may either be remnant cores of evaporated gas giants or products of consecutive collisions between super-Earths. Several pulsar
Giant_planet
Star at the centre of the Solar System
higher rate of fusion would cause the core to heat up more and expand slightly against the weight of the outer layers, reducing the density and hence
Sun
Elsasser (American, 1904–1991) – first mathematical dynamo theory for Earth's outer core Loránd Eötvös (Hungarian, 1848–1919) – developed a highly accurate
List_of_geophysicists
Gas giants with their atmospheric layers stripped
As there is a lack of gaseous "hot-super-Earths" between 2.2 and 3.8 Earth-radii exposed to over 650 Earth incident flux, it is assumed that exoplanets
Chthonian_planet
British geologist
July 1936. Harold Jeffreys – showed that Earth's outer core is liquid Inge Lehmann – showed that Earth's inner core is solid List of geophysicists Bragg,
Richard_Dixon_Oldham
Third planet from the sun
America Pedosphere Ocean floor Earth's mantle Earth's core Outer core Inner core This sphere represents all water on Earth, wherever it is and in whatever
Outline_of_Earth
Overview of and topical guide to Earth science
Discontinuity – The line between the inner core and the outer core. Inner core – The innermost part of the Earth, a solid ball of iron-nickel alloy. Atmospheric
Outline_of_Earth_science
Sixth planet from the Sun
Measurements of Saturn's rings suggest a much more diffuse core, with a mass equal to about 17 Earths and a radius equal to about 60% of Saturn's entire radius
Saturn
~150 km). These results imply that 40% of the core by volume has solidified. The density of the liquid outer core is about 5 g/cm3 and it could contain as
Internal structure of the Moon
Internal_structure_of_the_Moon
Basis of international space law
to the U.N. Office for Outer Space Affairs (UNOOSA), the core principles of the treaty are: the exploration and use of outer space shall be carried out
Outer_Space_Treaty
elements heavier than hydrogen and helium in their cores. When a red giant finally casts off its outer layers, these elements would then be recycled to
Formation and evolution of the Solar System
Formation_and_evolution_of_the_Solar_System
Earth's outer shell of rock
Earth's crust is its outer shell of rock, comprising less than one percent of the planet's radius and volume. It is the top component of the lithosphere
Earth's_crust
Chemical element with atomic number 92 (U)
thorium, and potassium-40 in Earth's mantle is thought to be the main source of heat that keeps the Earth's outer core in the liquid state and drives
Uranium
Natural satellite orbiting Earth
crust, mantle, and core. It a solid iron-rich inner core with a radius possibly as small as 240 kilometers (150 mi) and a fluid outer core primarily made
Moon
Fictional character
protagonist of his Pellucidar novels. He first appeared in the novel At the Earth's Core, serialized in four parts in All-Story Weekly from April 4–25, 1914 and
David_Innes
French physicist (born 1935)
inner core, revisited, Geophys. J. Int., 115, 147-151. Poirier, J.P. Light elements in the Earth's outer core: a critical review, Phys. Earth Planet
Jean-Paul_Poirier
Period in Earth's history
series of magma oceans and episodes of core formation. After formation of the core, meteorites or comets from the outer Solar System might have delivered water
Early_Earth
precipitate through the outer core of some terrestrial planets and moons as that core slowly cools, much like snowflakes do on Earth. These iron crystals
Iron_snow
Reversal of direction of Earth's magnetic field
liquid outer core but not in the solid inner core. Diffusion in the outer core is on timescales of 500 years or less while that of the inner core is longer
Geomagnetic_reversal
Movement of water in the deep Earth
above and on the surface of Earth. Some of the water makes it all the way to the lower mantle and may even reach the outer core. Mineral physics experiments
Deep_water_cycle
Paighon, an extra-galactic entity which now dwells in Earth's core, said to be inimical to the Outer God Ngyr-Korath and his servitor 'Ymnar. Purple Emperor
List of Cthulhu Mythos deities
List_of_Cthulhu_Mythos_deities
Planet that is composed primarily of silicate rocks or metals
terrestrial. Most of these are super-Earths, i.e. planets with masses between Earth's and Neptune's; super-Earths may be gas planets or terrestrial, depending
Terrestrial_planet
Type of seismic wave
the Earth's interior, and yet they are refracted slightly when they pass through the transition between the semisolid mantle and the liquid outer core. As
P_wave
of elements in the Sun and outer planets is similar to that in the universe. Due to solar heating, the elements of Earth and the inner rocky planets
Abundance of the chemical elements
Abundance_of_the_chemical_elements
Region at the center of a star
enough for hydrogen in a shell outside the core to start fusion. The core continues to collapse and the outer layers of the star expand. At this stage,
Stellar_core
Changes to stars over their lifespans
like the Sun has exhausted its nuclear fuel, its core collapses into a dense white dwarf and the outer layers are expelled as a planetary nebula. Stars
Stellar_evolution
Astronomical theory about the Solar System
situ growth of hot Jupiters from closely orbiting super Earths has also been proposed. The cores in this hypothesis could have formed locally or at a greater
Nebular_hypothesis
Hypothesis of the formation of the Moon
core, which gives it a much lower density than Earth. Computer models of a giant impact of a Mars-sized body with Earth indicate the impactor's core would
Giant-impact_hypothesis
Disproven hypothesis
liquid nickel-iron alloy (outer core), and solid nickel-iron (inner core). Another set of scientific arguments against a Hollow Earth or any hollow planet
Hollow_Earth
Model in planetary science
structure of Earth Iron catastrophe Core-mantle differentiation Earth's outer core Slattery, Wayne L. (December 1978). "Protoplanetary core formation by
Rain-out_model
American geochemist
identified 16 mantle hotspots where volcanic plumes rise from the Earth's outer core through the deep mantle by measuring their helium 3 to helium 4 ratio
Harmon_Craig
Study of the history and structure of the ocean floor
changes in the Earth's magnetic field. The outer layer of the Earth's core is liquid and mostly made up of magnetic iron and nickel. When the Earth turns on
Marine_geology
Type of electrical cable for building wiring
with the outer sheath covering the cores. TPS cable is available in several conductor configurations: single, twin, twin and earth, three and earth, and four
Thermoplastic-sheathed_cable
Different forms of the element iron
planetary cores. The inner core of the Earth is generally assumed to consist essentially of a crystalline iron-nickel alloy with ε structure. The outer core surrounding
Allotropes_of_iron
Hypothetical early-universe star with a black hole core
would have resulted from the core of a large supermassive protostar collapsing into a stellar-mass black hole, where the outer layers of the protostar are
Quasi-star
Astrogeological concept
compositionally differentiated zones in the solid Earth are the very dense iron-rich metallic core, the less dense magnesium-silicate-rich mantle and
Planetary_differentiation
Rotation of Earth around its axis
molten core, oceans, and atmosphere, the effect of celestial bodies such as the Moon, and possibly climate change, which is causing the ice at Earth's poles
Earth's_rotation
Astrophysical phenomenon
output of the event. The suddenly halted core collapse rebounds and produces a shock wave that stalls in the outer core within milliseconds as energy is lost
Supernova
Type of large cool star
core reaches temperatures sufficient to fuse hydrogen and thus generate its own radiation and thermal pressure, which "re-inflates" the star's outer layers
Red_giant
Explosion of a star 8 to 45 times the mass of the Sun
cataclysmic implosion of the core takes place within seconds. Without the support of the now-imploded inner core, the outer core collapses inwards under gravity
Type_II_supernova
Fluid instability that causes turbulence in accretion disks
dynamo (Moffatt, 1978); the two best studied examples are the Earth's liquid outer core and the layers close to the surface of the Sun. Dynamo activity
Magnetorotational_instability
Rate of temperature increase with depth in Earth's interior
vicinity, but only the outer core is postulated to exist in a molten or fluid state, and the temperature at Earth's inner core/outer core boundary, around 5
Geothermal_gradient
Large self-illuminated object in space
hydrogen into helium in its core. This process releases energy that traverses the star's interior and radiates into outer space. At the end of a star's
Star
Botanist (1919–1980)
until his death. He worked on the melting temperature of rocks in the earth's outer core and proposed some rules that are sometimes termed as Kennedy's law
George_Clayton_Kennedy
three letters denoting the type of wave-motion through the mantle and outer core. The first S indicates that the wave travels as a shear or S wave through
SKS_wave
2015. Earth sciences portal Escape velocity – Concept in celestial mechanics Atmospheric escape – Loss of planetary atmospheric gases to outer space Figure
Gravity_of_Earth
Rotational center of the Milky Way galaxy
stars from star formation in the region around 1 million years ago. The core stars are a small part within the much wider central region, called the galactic
Galactic_Center
Volcanism away from plate margins
nucleates[clarification needed] at the core-mantle boundary and rises through the Earth's mantle becoming a diapir in the Earth's crust. In particular, the concept
Intraplate_volcanism
Ancient planet that collided with Earth
the Earth's orbit, although some hypotheses debatably suggested it may have formed in the outer Solar System and later migrated into the Earth's orbit
Theia_(hypothetical_planet)
3D Internet global map program
Google announced Google Earth Pro will no longer be available for download on 25 June 2027. The core technology behind Google Earth was originally developed
Google_Earth
Indian mathematician and astrophysicist (1936–2021)
1038/260557a0. India portal "Padma". Retrieved August 6, 2014. "Dynamo Theory and Earth's Magnetic Field" (PDF). Retrieved August 6, 2014. "PhD". Retrieved August
Shashikumar_Chitre
Topics referred to by the same term
the region of the Earth's mantle that was historically known as "the mesospheric shell" and is located directly above the outer core Mesosphere (software)
Mesosphere_(disambiguation)
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EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
EARTHS OUTER-CORE
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