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Cool, tenuous region of the Sun's corona
A coronal hole is a region of the Sun's corona that appears dark in extreme-ultraviolet (EUV) and soft-X-ray images because its plasma is cooler and more
Coronal_hole
Outermost layer of the Sun's atmosphere
such as in coronal loops, will confine the coronal plasma, while open field lines that reach interplanetary space, such as in coronal holes, will allow
Solar_corona
Ejecta from the Sun's corona
A coronal mass ejection (CME) is a significant ejection of plasma mass from the Sun's corona into the heliosphere. CMEs are often associated with solar
Coronal_mass_ejection
Star at the centre of the Solar System
included the first observations of coronal mass ejections, then called "coronal transients", and of coronal holes, now known to be intimately associated
Sun
Stream of charged particles from the Sun
also emitting a slow solar wind. The fast solar wind originates from coronal holes, which are funnel-like regions of open field lines in the Sun's magnetic
Solar_wind
Series of intense solar storms in 2024
produced an X1.0-class and multiple M-class solar flares and launched several coronal mass ejections (CMEs) toward Earth. On 9 May, the active region produced
May_2024_solar_storms
Arch-like structure in the Sun's corona
In solar physics, a coronal loop is an ill-defined arch-like structure in the Sun's atmosphere made up of relatively dense plasma confined and isolated
Coronal_loop
Structure extending off of the Sun's surface
thousands of kilometers into space. Some prominences may give rise to coronal mass ejections. Exact mechanism of prominence generation is an ongoing
Solar_prominence
Structure in the Sun's corona
are open, oppositely directed magnetic fields which are anchored to coronal holes lower in the corona. The white-light emissions of helmet streamers is
Helmet_streamer
Brightest star in the constellation Lyra
non-existent. However, as the pole of Vega is facing Earth and a polar coronal hole may be present, confirmation of a corona as the likely source of the
Vega
Region of space dominated by the Sun
November 2018: Voyager 2 crosses the heliopause, departing the heliosphere. Coronal mass ejection Fermi glow Martha, Gale (1 April 2013). "The Sun's Heliosphere"
Heliosphere
Jet of plasma in the Sun's atmosphere
quiet-Sun region, a coronal hole, or the Sun's poles, they are sometimes known as active region jets, quiet-Sun jets, coronal hole jets, or polar jets
Solar_jet
Atmospheric effect caused by the solar wind
Earth's magnetosphere caused by enhanced speeds of solar wind from coronal holes and coronal mass ejections. These disturbances alter the trajectories of charged
Aurora
Central region of the Sun
Chromosphere Plage Spicule Moreton wave Corona Transition region Coronal hole Coronal loop Coronal mass ejection Nanoflare Prominence Helmet streamer Supra-arcade
Solar_core
Region of a star
Chromosphere Plage Spicule Moreton wave Corona Transition region Coronal hole Coronal loop Coronal mass ejection Nanoflare Prominence Helmet streamer Supra-arcade
Convection_zone
the Sun, most often from coronal mass ejections (CMEs) and solar flares from active regions, or, less often, from coronal holes. Minor to active solar storms
List_of_solar_storms
NASA probe of the Sun's outer corona
2019). "Highly structured slow solar wind emerging from an equatorial coronal hole". Nature. 576 (7786): 237–242. Bibcode:2019Natur.576..237B. doi:10
Parker_Solar_Probe
Eruption of electromagnetic radiation
occur in active regions and are often, but not always, accompanied by coronal mass ejections, solar particle events, and other eruptive solar phenomena
Solar_flare
Region of a star
Chromosphere Plage Spicule Moreton wave Corona Transition region Coronal hole Coronal loop Coronal mass ejection Nanoflare Prominence Helmet streamer Supra-arcade
Radiative_zone
Zone of energetic charged particles around the planet Earth
Van Allen Probe team, it was stated that this third belt is a product of coronal mass ejection from the Sun. It has been represented as a separate creation
Van_Allen_radiation_belt
Temporary spots on the Sun's surface
other active region phenomena such as coronal loops, prominences, and reconnection events. Most solar flares and coronal mass ejections originate in these
Sunspot
Natural phenomena within the Sun's atmosphere
forms, including solar wind, radio wave flux, solar flares, coronal mass ejections, coronal heating and sunspots. These phenomena are believed to be generated
Solar_phenomena
Type of episodic heating event
hypothesis of small impulsive heating events as a possible explanation of the coronal heating was first suggested by Thomas Gold and then later developed and
Nanoflare
Solar wind structure
CIRs develop when high-speed solar wind, typically originating from coronal holes, catches up to slower wind streams. The resulting compression creates
Corotating_interaction_region
Semi-empirical solar wind model used in space weather forecasting
to the nearest coronal-hole boundary at the footpoint. The WSA speed relation assigns a terminal solar wind speed near the outer coronal boundary as a
Wang–Sheeley–Arge_model
Solar activity from 2019 to about 2030
from the original on 16 November 2023. Retrieved 16 November 2023. "Coronal hole faces Earth". Space Weather Live. Archived from the original on 21 September
Solar_cycle_25
Surface of magnetic polarity change
Flux transfer event Solar phenomena Solar cycle max min Solar storm Coronal hole CME Solar prominence Solar flare Solar particle event Radio emission
Heliospheric_current_sheet
Overview of the scientific field of astronomy
Spicule Moreton wave Solar corona Solar transition region Coronal hole Coronal loop Coronal mass ejection Solar prominence Helmet streamer Solar variation
Outline_of_astronomy
Science of the heliosphere
Flux transfer event Solar phenomena Solar cycle max min Solar storm Coronal hole CME Solar prominence Solar flare Solar particle event Radio emission
Heliophysics
Model for space weather forecasting
expansion factor and the distance from the magnetic footpoint to the nearest coronal hole boundary. These parameters are derived from synoptic magnetograms that
Enlil_(heliospheric_model)
Solar magnetic field model
physicists use PFSS to map open magnetic field regions that correlate with coronal holes, to estimate the heliospheric current sheet shape, and to drive space-weather
Potential-field source-surface model
Potential-field_source-surface_model
Headquarters History Division. pp. 34–60. ISBN 0-16-058859-6. "Massive Coronal Hole on the Sun". NASA. 24 June 2013. Retrieved 31 October 2014. Fimmel, R
Timeline of Solar System astronomy
Timeline_of_Solar_System_astronomy
Layer of the Sun's atmosphere
of material at or around this temperature catastrophe. Moreton wave Coronal hole Solar spicule "The Transition Region". Solar Physics, NASA Marshall Space
Solar_transition_region
Magnetic field reversals in the solar wind
a solar wind stream magnetically connected to a southern hemisphere coronal hole, while it was at 0.98 AU from Sun, and observed a fast solar wind with
Magnetic_switchback
Reception on the VHF frequency band
signals will arrive from that general direction. An active region or coronal hole may persist for some 27 days resulting in a second aurora when the Sun
TV_and_FM_DX
Region of turbulence within a fluid
closed-magnetic flux cousins of the open-magnetic flux that can be found in coronal hole (polar) regions and the solar wind. Loops of magnetic flux well up from
Rooster_tail
American space weather physicist
Nariaki (12 December 2016). "The Relationship between Stealth CMEs and Coronal Holes: Origin, Interaction, and Geoeffectiveness". AGU Fall Meeting Abstracts
Tamitha_Skov
Type of radio propagation
The occurrence of radio-auroras depends on solar activity (flares, coronal holes, CMEs) and annually the events are more numerous during solar cycle
Non-line-of-sight_propagation
NASA/DLR solar probes launched in 1974–76
phenomena of the high-speed solar wind were associated with the presence of coronal holes. This instrument also detected, for the first time, helium ions isolated
Helios_(spacecraft)
First space station launched and operated by NASA (1973–1979)
impossible to obtain with uncrewed spacecraft. The existence of the Sun's coronal holes was confirmed because of these efforts. Many of the experiments conducted
Skylab
Solar observation program
produces daily magnetograms, Doppler velocity maps, equivalent width maps, coronal hole maps, and synoptic magnetic field charts. Following relocations in 2014
NSO Integrated Synoptic Program
NSO_Integrated_Synoptic_Program
Nigerian astronomer and educator (1941-)
Baliunas, S; Posmentier, E.S; Okeke, P (2000). "Variations of solar coronal hole area and terrestrial lower tropospheric air temperature from 1979 to
Pius_N._Okeke
and XRS on GOES 12 allowed forecasters to see space phenomena such as coronal holes, whose geomagnetic and proton storms impact electrical grid systems
Solar_X-ray_Imager
Scientific studies carried out using scientific equipment in outer space
of three during its operational time. Skylab's experiments confirmed coronal holes and were able to photograph eight solar flares. Soviet (later Russian)
Space_research
solar cycle recover from a minimum state? What is the cause of solar wind? Coronal heating problem: Why is the Sun's corona so much hotter than the Sun's
List of unsolved problems in astronomy
List_of_unsolved_problems_in_astronomy
from the corona changes in active regions, in the quiet Sun and in coronal holes; actually, part of the energy is irradiated outwards, but approximately
Coronal_radiative_losses
Astronomical observatory in Massachusetts, US
was created, and a CfA/SAO instrument flying aboard Skylab discovered coronal holes on the Sun. The founding of the CfA also coincided with the birth of
Harvard–Smithsonian Center for Astrophysics
Harvard–Smithsonian_Center_for_Astrophysics
Outermost layer of a star's atmosphere
in turn, derived from Ancient Greek κορώνη (korṓnē) 'garland, wreath'. Coronal stars are ubiquitous among the stars in the cool half of the Hertzsprung–Russell
Stellar_corona
Indian American Solar Physicist
Freeland, S.; Howard, R. A. (1 February 2009). "Euv Wave Reflection from a Coronal Hole". The Astrophysical Journal. 691 (2): L123–L127. Bibcode:2009ApJ...691L
Natchimuthuk_Gopalswamy
Mexican physicist
fuentes de perturbaciones a gran escala en el viento solar (The Sun's coronal holes as sources of large-scale disturbances in the solar wind), advised by
Silvia_Bravo
Conder plot - conjugate points - corona - coronagraph - coronal hole - coronal loops - coronal mass ejection - cosmic noise - cosmic ray - COST Hata model
Index of radio propagation articles
Index_of_radio_propagation_articles
Branch of astronomy that uses X-ray observation
tenuous gas surrounding the Sun was inferred indirectly from optical coronal lines of highly ionized species. The Sun has been known to be surrounded
X-ray_astronomy
Optical instrument for ultraviolet images
in the corona, characterization of coronal mass ejection onset, and determination of the structure of coronal holes. Before mid-2010, EIT obtained an Fe
Extreme ultraviolet Imaging Telescope
Extreme_ultraviolet_Imaging_Telescope
NOAA weather satellite
The goals of SUVI are to locate coronal holes, detect and locate solar flares, monitor changes that indicate coronal mass ejections, detect active regions
GOES-16
Low-frequency plasma wave
astrophysical settings. They are particularly significant for their role in the coronal heating problem, energy transport in the solar atmosphere, particle acceleration
Alfvén_wave
Space instrument aboard the PROBA2 satellite
solar disc from the CME eruption site), EUV dimming regions (transient coronal holes from where the CME has lifted off), filament instabilities (a specific
SWAP_(instrument)
Congenital disorder of the skull and digits
(fusion of the coronal suture and lambdoid suture bilaterally), dolichocephaly (fusion of the sagittal suture), plagiocephaly (fusion of coronal and lambdoidal
Apert_syndrome
Astronomical object emitting X-rays
astronomical X-ray sources is in, near to, or associated with a coronal cloud or gas at coronal cloud temperatures for however long or brief a period. A combination
Astrophysical_X-ray_source
NASA satellite of the Explorer program, at SE-L1 from 1997
1086/591543. McComas, D. J.; et al. (2008). "Weaker solar wind from the polar coronal holes and the whole Sun". Geophys. Res. Lett. 35 (18): L18103. Bibcode:2008GeoRL
Advanced_Composition_Explorer
NOAA weather satellite
California. Solar Ultraviolet Imager (SUVI) for observing coronal holes, solar flares and coronal mass ejection source regions. Extreme Ultraviolet and X-ray
GOES-17
System of deep space communications and planetary radar
Jupiter Radio astronomy: April 1964 – study Crab Nebula 2004 – study coronal holes Grahn, Sven. Yevpatoria – as the U.S. saw it in the 1960s Mitchell,
Pluton_(complex)
Matter and radiation in the space between the star systems in a galaxy
T, hot regions (high T) generally have low particle number density n. Coronal gas has low enough density that collisions between particles are rare and
Interstellar_medium
German geophysicist and statistician
"M-regions" on the Sun that resulted in geomagnetic activity. These coronal holes were later confirmed by the Skylab mission. Finally he also helped initiate
Julius_Bartels
toward the root tip(s) or apex(es) of a tooth (the apices), as opposed to coronal, which refers to the direction toward the crown. It may also refer to something
Glossary_of_dentistry
Multiple system in the constellation Cygnus
black hole. This plasma consists of electrons and their antimatter counterparts, positrons. A follow-up study of the 2015 data found a coronal magnetic
V404_Cygni
grand minima, and how does the solar cycle recover from a minima state? Coronal heating problem: Why is the Sun's corona (atmosphere layer) so much hotter
List of unsolved problems in physics
List_of_unsolved_problems_in_physics
Form of body piercing on a part of the genitalia
through the dorsal (top) side of the glans. The dydoe pierces through the coronal rim of the glans. With the exception of the dydoe, all these piercings
Genital_piercing
2009 novel by James Dashner
American author James Dashner. It takes place in a world suffering from a coronal mass ejection and whose surviving civilians fight to avoid an apocalyptic
The_Maze_Runner
occurred since Early Modern English in certain -al- and -ol- sequences before coronal or velar consonants, or at the end of a word or morpheme. In these sequences
English-language vowel changes before historical /l/
English-language_vowel_changes_before_historical_/l/
Techniques for imaging corona discharges
of photographic techniques used to capture the phenomenon of electrical coronal discharges. It is named after Soviet inventor and researcher of Armenian
Kirlian_photography
Cartilaginous tube
thorax (axial lung window) CT scan of the thorax (coronal lung window) CT scan of the thorax (coronal mediastinal window) Cross section of a trachea and
Trachea
Santa Coronal suture Lambdoid suture Squamosal suture Sagittal suture The Lazy Cat Sleeps Safely Temporomandibular joint Lambdoid suture Coronal suture
List_of_anatomy_mnemonics
Word initial consonantal sound changes in Irish
nasal quality, lenited *t debuccalised to [h], and lenited *d lost its coronal articulation. Lenition did not only occur word initially, though non-initial
Irish_initial_mutations
Variety of Mesopotamian Arabic spoken in Baghdad, Iraq
("emphatic") sounds. The emphatic coronals (/sˤ/, /tˤ/, and /ðˤ/) cause assimilation of emphasis to adjacent non-emphatic coronal consonants.[citation needed]
Baghdadi_Arabic
Telescopic attachment designed to block out the direct light from a star
of the corona: both coronal light and sky brightness are scattered sunlight and have similar spectral properties, but the coronal light is Thomson-scattered
Coronagraph
Dental prosthetic that recreates the visible portion of a tooth
used, including the use of a post and core system and the type of extra-coronal restoration selected. Some evidence advocates the use of a ferrule to optimise
Crown_(dental_restoration)
Magnetic field generated inside a star
This creates starspots on the surface, and the related phenomenon of coronal loops. A star's magnetic field can be measured using the Zeeman effect
Stellar_magnetic_field
Mezentsev (born 1949), a Russian astronomer, solar physics expert, coronal holes researcher, lecturer in Petrozavodsk State University and astronomy
Meanings of minor-planet names: 228001–229000
Meanings_of_minor-planet_names:_228001–229000
Layer of a star's atmosphere
boundary with the transition layer of the corona (see Stellar corona § Coronal heating problem). The density of the chromosphere is 10−4 times that of
Chromosphere
Radio waves produced by the Sun
processes that lead to other forms of solar activity like solar flares and coronal mass ejections. Radio emission from the Sun was first reported in the scientific
Solar_radio_emission
American English accent of South Florida
lowering of the FOOT vowel, towards [ə~ɔ̝]. GOOSE fronting only occurs after coronal consonants (/t/, /d/, /s/, /z/, /n/), which have heavy fronting A completed
Miami_accent
Mesopotamian Arabic dialect spoken in Iran
("emphatic") sounds. The emphatic coronals (/sˤ/, /dˤ/, /tˤ/, and /ðˤ/) cause assimilation of emphasis to adjacent non-emphatic coronal consonants.[citation needed]
Khuzestani_Arabic
Hole in the temporal bone
The hiatus for the greater petrosal nerve is a small hole in the petrous part of the temporal bone which connects the facial canal to the middle cranial
Hiatus for greater petrosal nerve
Hiatus_for_greater_petrosal_nerve
Event wherein the Sun is obscured by the Moon
faint corona will be visible, and the chromosphere, solar prominences, coronal streamers and possibly even a solar flare may be seen. At the end of totality
Solar_eclipse
Process that leads to gradual decrease of the distance between two orbiting bodies
Low Earth Orbiting Satellites due to Heating of Earth's Atmosphere by Coronal Mass Ejections". arXiv:1305.0233 [physics.space-phn]. Wall, Mike (May 5
Orbital_decay
star's corona from the stellar wind, defined as the point at which the coronal plasma's Alfvén speed equals the large-scale stellar wind speed. Am star
Glossary_of_astronomy
Bony structure that forms the head in vertebrates
bone creating sutures. The five sutures are the two squamous sutures, one coronal, one lambdoid, and one sagittal suture. The posterior fontanelle usually
Skull
Phonology of the Irish language
found when a coronal consonant (⟨d, l, n, r, s, t⟩) changes from being broad to being slender before a word that begins with a slender coronal consonant
Irish_phonology
respectively. The emphatic coronals (/sˤ/, /dˤ/, /tˤ/, and /ðˤ/) cause assimilation of emphasis to adjacent non-emphatic coronal consonants.[citation needed]
Standard_Arabic_phonology
Membrane separating the external ear from the middle ear
inner ear. External and middle ear, right side, opened from the front (coronal section) Horizontal section through left ear; upper half of section The
Eardrum
Subfield of astronomy
exemplifying supermassive black hole seed growth. Accretion disks Astrophysical jets and outflows Stellar flares and coronal mass ejections Pulsars and magnetars
Outline_of_astrophysics
Star system in the Centaurus constellation
activity on Alpha Centauri A is comparable to that of the Sun, showing coronal variability due to star spots, as modulated by the rotation of the star
Alpha_Centauri
Brazilian astrophysicist
Union, on Supermassive Black Holes, Feedback and Galaxy Evolution. Storchi-Bergmann, Thaisa; Dere, Kenneth (2005). Coronal and stellar mass ejections :
Thaisa_Storchi_Bergmann
Standard unit of mass in astronomy
of the Sun are ejected directly into outer space as the solar wind and coronal mass ejections. The original mass of the Sun at the time it reached the
Solar_mass
Reconstructed ancestor of the Austronesian languages
Blust are in agreement. The major disagreement concerns the system of coronal consonants. The following discussion is based on Ross (1992). Otto Dempwolff's
Proto-Austronesian_language
Physical phenomenon of stars
of factors, including: Gravitational attraction of a binary companion Coronal mass ejection-type events Ascension to red giant or red supergiant status
Stellar_mass_loss
Large self-illuminated object in space
temperatures. Coronal loops are arching magnetic field flux lines that rise from a star's surface into the star's outer atmosphere, its corona. The coronal loops
Star
Star in the constellation Canis Major
at different speeds, confirming multiple events and directions as with coronal mass ejections. Multiple asymmetric mass loss events and the ejection of
VY_Canis_Majoris
Hypothetical process of mining a star for resources
David Criswell. Stars already lose a small flow of mass via solar wind, coronal mass ejections, and other natural processes. Over the course of a star's
Star_lifting
Delateralization feature of Spanish dialects
Spanish language List of phonetics topics Phonological history of Spanish coronal fricatives (distinción, seseo and ceceo) Rhoticity in English "La "i griega"
Yeísmo
CORONAL HOLE
CORONAL HOLE
Girl/Female
Christian, French, German, Hindu, Indian, Spanish
Crown
Boy/Male
English Latin
College; name of a town.
Girl/Female
Hindi
Kind.
Boy/Male
Irish Gaelic
Little dark one.
Surname or Lastname
English
English : variant of Cordell.
Boy/Male
English
College; name of a town.
Boy/Male
English
College
Girl/Female
Spanish
Crowned.
Girl/Female
Arabic, Australian, Muslim
Corolla; Blossom
Boy/Male
English
College; name of a town.
Boy/Male
Australian, Celtic, Irish
High; Mighty
Girl/Female
Greek
Mother of Aesculapius.
Surname or Lastname
English
English : variant spelling of Carnell.French : metonymic occupational name for a maker of latches and hinges, from Old Picard carnel, Old French charnel ‘hinge’.
Boy/Male
English American
Military rank.
Female
English
English name derived from the vocabulary word, Latin corona, CORONA means "crown, garland, wreath." The outer atmosphere of a star is called a corona.
Girl/Female
Irish
Constant.
Girl/Female
Indian
Semi-precious sea growth often Deep pink, Red
Male
Romanian
Romanian form of Greek Kornelios, CORNEL means "of a horn."
Female
English
English name derived from the gem name, from Latin corallium, probably ultimately from Hebrew goral, CORAL means "small pebble."
Girl/Female
American, Australian, British, Christian, Dutch, English, Finnish, French, German, Greek, Latin, Portuguese, Swedish
Maiden
CORONAL HOLE
CORONAL HOLE
Boy/Male
Hindu, Indian, Malayalam, Marathi, Traditional
Goddess House
Boy/Male
Irish
Generous.
Girl/Female
Tamil
Kanu Priya | கநà¯à®ªà¯à®°à®¿à®¯à®¾
Radha
Girl/Female
Muslim
(She was the daughter of Umaymah daughter of Ruqayqah ra a companion)
Boy/Male
American, Australian, British, English
From the Ancient Oak Tree
Boy/Male
Arabic, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Muslim, Parsi, Pashtun, Telugu, Ukrainian
Large; Very Tall; Decoration; Unknown; Brave Fighter
Girl/Female
Latin
Daughter of Lamedon.
Boy/Male
Indian
A female pigeon name of An
Girl/Female
Arabic, Muslim
Luminous; Radiant
Boy/Male
Indian, Tamil
King of Royal
CORONAL HOLE
CORONAL HOLE
CORONAL HOLE
CORONAL HOLE
CORONAL HOLE
n.
The frontal bone, over which the ancients wore their coronae or garlands.
n.
An inner appendage to a petal or a corolla, often forming a special cup, as in the daffodil and jonquil.
a.
Of or pertaining to a corona (in any of the senses).
a.
Of or pertaining to the top of the head or skull.
n.
The iron head of a tilting spear; a coronel.
pl.
of Corona
a.
Of or pertaining to a colony; as, colonial rights, traffic, wars.
n.
A crown or circlet suspended from the roof or vaulting of churches, to hold tapers lighted on solemn occasions. It is sometimes formed of double or triple circlets, arranged pyramidically. Called also corona lucis.
n.
Any invigorating and stimulating preparation; as, a peppermint cordial.
n.
A secondary or inner corolla; a corona, as of the Narcissus.
n.
A colonel.
a.
Resembling, or situated like, a crown or circlet; as, the coronary arteries and veins of the heart.
n.
Any species of the genus Cornus, as C. florida, the flowering cornel; C. stolonifera, the osier cornel; C. Canadensis, the dwarf cornel, or bunchberry.
n.
A corolla.
n.
A crown; wreath; garland.
n.
The chief officer of a regiment; an officer ranking next above a lieutenant colonel and next below a brigadier general.
a.
Of or pertaining to the shell of a sea urchin.
n.
Informal shortening of coronary thrombosis, also used generally to mean heart attack.
pl.
of Corona
n.
A coronet or little crown of a seed; the downy tuft on seeds. See Pappus.