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Interstellar absorption and scattering of light
In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the
Extinction_(astronomy)
Topics referred to by the same term
term for mass attenuation coefficient), in physical sciences Extinction (astronomy) Extinction (optical mineralogy), when cross-polarized light dims, as
Extinction_(disambiguation)
Gradual loss of flux intensity through a medium
Electrical impedance Environmental remediation for natural attenuation Extinction (astronomy) ITU-R P.525 Mean free path Path loss Radar horizon Radiation length
Attenuation
Measurement of radiant electromagnetic power emitted by an object
synonymous with the radiant power emitted by a light-emitting object. In astronomy, luminosity is the total amount of electromagnetic energy emitted per
Luminosity
Dense obscuring band of interstellar dust
than typical for observed dense molecular cloud (DMC) behavior. Extinction (astronomy) Interplanetary medium Intergalactic dust Interplanetary dust Interstellar
Dust_lane
Logarithmic measure of the brightness of an astronomical object
In astronomy, magnitude is a measure of the brightness of an object, usually in a defined passband. An imprecise but systematic determination of the magnitude
Magnitude_(astronomy)
of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is
Glossary_of_astronomy
OB association in the constellation Scorpius
spatial distribution of the interstellar extinction" [The spatial distribution of the interstellar extinction]. Astronomy and Astrophysics Supplement Series
Scorpius_OB1
Determination of light intensities of astronomical bodies
In astronomy, photometry, from Greek photo- ("light") and -metry ("measure"), is a technique used in astronomy that is concerned with measuring the flux
Photometry_(astronomy)
Amount of air seen through in astronomical observations
In astronomy, air mass or airmass is a measure of the amount of air along the line of sight when observing a star or other celestial source from below
Air_mass_(astronomy)
Academic journal
Astronomy & Astrophysics (A&A) is a monthly peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics
Astronomy_&_Astrophysics
Pattern of stars recognized on Earth's night sky
Australian Aboriginal astronomy Chinese constellations Former constellations Nakshatra "An Etymological Dictionary of Astronomy and Astrophysics: asterism"
Asterism_(astronomy)
French astrophysicist (born 1963)
(1986). "The visible and infrared extinction law and the gas-to-dust ratio in the Small Magellanic Cloud". Astronomy and Astrophysics. 149 (2): 330. Bibcode:1985A&A
Patrice_Bouchet
Galaxy containing the Solar System
billion years. solar system portal outer space portal astronomy portal Baade's Window Galactic astronomy Galactic Center GeV excess Oort constants The distance
Milky_Way
Aspect of Precolumbian Maya science
Maya astronomy is the study of the Moon, planets, Milky Way, Sun, and astronomical phenomena by the Precolumbian Maya civilization of Mesoamerica. The
Maya_astronomy
Branch of astronomy that uses X-ray observation
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects. X-radiation
X-ray_astronomy
Star at the centre of the Solar System
Unsolved problem in astronomy Why is the Sun's corona so much hotter than the Sun's surface? More unsolved problems in astronomy The temperature of the
Sun
Type of interstellar cloud that obscures visible light
it, such as background stars and emission or reflection nebulae. The extinction of the light is caused by interstellar dust grains in the coldest, densest
Dark_nebula
Prehistoric impact crater in Mexico
impact was the primary cause of the Cretaceous–Paleogene extinction event, a mass extinction of 75% of plant and animal species on Earth, including all
Chicxulub_crater
Overview of the scientific field of astronomy
Pretelescopic astronomy Babylonian astronomy Chinese astronomy Egyptian astronomy Greek astronomy Hebrew astronomy Indian astronomy Islamic astronomy Russian
Outline_of_astronomy
Topics referred to by the same term
games Very-High Energy, in astronomy and high-energy physics (refers to energies around the TeV) Voluntary Human Extinction Alternately, "Vhe" is a name
VHE
1998 film by Mimi Leder
7-mile (11 km) wide comet set to collide with Earth and cause a mass extinction. Deep Impact was released in the same summer as the similarly themed Armageddon
Deep_Impact_(film)
Area of sky obscured by the Milky Way
Way cause extinction at optical wavelengths, and foreground stars can be confused with background galaxies. However, the effect of extinction drops at
Zone_of_Avoidance
Large self-illuminated object in space
oldest accurately dated star chart was the result of ancient Egyptian astronomy in 1534 BC. The earliest known star catalogues were compiled by the ancient
Star
Densest star cluster known
dynamical mass segregation and the effect of the extinction law on the stellar mass function". Astronomy and Astrophysics. 556 (A26): A26. arXiv:1212.3355
Arches_Cluster
Scientific projections regarding the far future
unlikely collision with some object, all five should persist indefinitely. Astronomy portal Stars portal Outer space portal World portal Chronology of the
Timeline_of_the_far_future
Void between celestial bodies
this, extinction, which is the absorption and scattering of photons by dust and gas, is an important factor in galactic and intergalactic astronomy. Stars
Outer_space
Human vision, unaided by optical instruments
instrument, such as a telescope or microscope, or eye protection. In astronomy, the naked eye may be used to observe celestial events and objects visible
Naked_eye
Succession of methods by which astronomers determine the distances to celestial objects
no single technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second
Cosmic_distance_ladder
Topics referred to by the same term
(Lifetime album), 1992 Background (Bassi Maestro album), 2002 Background extinction rate Background independence, a condition in theoretical physics Background
Background
Overview of and topical guide to space science
Stellar astronomy – concerned with Star formation, physical properties, main sequence life span, variability, stellar evolution and extinction. Galactic
Outline_of_space_science
Chilean astrophysicist and academician
May 2020. "The accuracy of extinction determinations". amazon.co.uk. Retrieved May 12, 2016. "The atmospheric extinction at Cerro Tololo". amazon.co
Adelina_Gutiérrez
Discrepancy of the lack of evidence for alien life despite its apparent likelihood
have been numerous major extinction events that destroyed the majority of complex species alive at the time; the extinction of the non-avian dinosaurs
Fermi_paradox
Constellation near the celestial equator
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94,
Aquila_(constellation)
Gap in interstellar dust allowing for observation of the center of the Milky Way Galaxy
Dutra C.M.; Santiago B.X.; Bica E. (2002). "Low-extinction windows in the inner Galactic Bulge". Astronomy & Astrophysics. 460 (1): L37. arXiv:astro-ph/0110658
Baade's_Window
Long-term future of planet Earth
Holocene extinction is being caused by technology, and the effects may last for up to five million years. In turn, technology may result in the extinction of
Future_of_Earth
mass extinction, and the Manicouagan impact has been less definitively linked to the Adamanian-Revueltian turnover and a possible marine extinction event
List of impact structures on Earth
List_of_impact_structures_on_Earth
Stars passing close to other stars
Nearby supernovae can be devastating to life on Earth causing the total extinction of its life and erode the ozone layer. Especially close stellar encounters
Stellar_encounter
Stars sorted by absolute magnitude
Earth), the distance to each star, and a correction for interstellar extinction. The entries in the list below are further corrected to provide the bolometric
List_of_most_luminous_stars
Star in the constellation of Apus
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111
HD_154972
Planetary system consisting of the Sun and objects orbiting it
2022. Retrieved 10 July 2025. "IAU Office of Astronomy for Education". astro4edu.org. IAU Office of Astronomy for Education. Archived from the original on
Solar_System
Spectroscopic binary in the constellation Camelopardalis
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904
HD_120565
Spectroscopic binary with an Am star
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904
41_Sextantis
Lake in Quebec, Canada
to an extinction event. The timing of the Manicouagan impact coincides with the Adamanian-Revueltian turnover, a possibly localized extinction event where
Manicouagan_Reservoir
Ratio of total mass of a galaxy or cluster to its luminosity
correcting the observed brightness of the object for the distance dimming and extinction effects. In general, unless a complete spectrum of the radiation emitted
Mass-to-light_ratio
Relative abundance of heavy elements in a star or other astronomical object
In astronomy, metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium. Most of the normal currently detectable
Metallicity
Event wherein the Sun is obscured by the Moon
that the calculation of eclipses was one of the many things that connect astronomy with the Islamic law, because it allowed knowing when a special prayer
Solar_eclipse
Great Bear (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 16 日 Archived 2012-02-04 at the Wayback Machine this
Ursa Major in Chinese astronomy
Ursa_Major_in_Chinese_astronomy
Astronomical survey
a multi-wavelength astronomical survey of a patch of the sky with low extinction and zodiacal scattering. The purpose of the survey is to study the physical
AEGIS_(astronomy)
Astronomical object capable of nuclear fusion
fusor in Wiktionary, the free dictionary. Gas giant Mesoplanet Planetar (astronomy) Basri, Gibor (Nov–Dec 2003). "Defining "Planet"". Mercury. 105 (1). Astronomical
Fusor_(astronomy)
Extremely bright meteor
ago. Scientific consensus agrees that this event directly led to the extinction of all non-avian dinosaurs, and it is evidenced by a thin layer of iridium
Bolide
Region of gravitational attraction in the local universe
maps require combining these surveys with corrections for the optical extinction caused by the intervening gas. Early calculations treated the Great Attractor
Great_Attractor
Star in the constellation Equuleus
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111
HD_200661
severity of the event, ranging from temporary economic disruption to human extinction. Many societal collapses have already happened throughout human history
Global_catastrophe_scenarios
Material world and its phenomena
identifiable mass extinctions. The last mass extinction occurred some 66 million years ago, when a meteorite collision probably triggered the extinction of the non-avian
Nature
Open cluster in the constellation Scutum
magnitude 16.5. It has an integrated absolute magnitude of –6.5, and a visual extinction of 1.3. The cluster is metal-rich with an iron abundance of [Fe/H] = 0
Wild_Duck_Cluster
Branch of astronomy
Dust astronomy is a subfield of astronomy that uses the information contained in individual cosmic dust particles ranging from their dynamical state to
Dust_astronomy
Brightest star in the constellation of Carina
(2000). Astronomy and the Dreaming: The Astronomy of the Aboriginal Australians. Astronomy Across Cultures: The History of Non-Western Astronomy. Kluwer
Canopus
Cavity hundreds of light years across created by strong stellar winds in a galaxy
In astronomy a superbubble or supershell is a cavity which is hundreds of light years across and is populated with hot (106 K) gas atoms, less dense than
Superbubble
or listed separately if they do not. As with all magnitude systems in astronomy, the scale is logarithmic and inverted, i.e., lower/more negative numbers
List_of_brightest_stars
Near-Earth asteroid
massive than the impactor that created Chicxulub crater and led to the extinction of the non-avian dinosaurs. The NEAR Shoemaker probe was launched by NASA
433_Eros
Astrometric binary in Camelopardalis
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904
HD_32356
American astronomer
comet 208P/McMillan. McMillan earned a Bachelor of Science degree in Astronomy with High Honors from the Case Institute of Technology in June 1972. His
Robert S. McMillan (astronomer)
Robert_S._McMillan_(astronomer)
Brightness of a celestial object observed from the Earth
Its value depends on its intrinsic luminosity, its distance, and any extinction of the object's light caused by interstellar dust or atmosphere along
Apparent_magnitude
A-type dwarf; Corona Australis
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111
HD_176425
Method to visualize the chronology of the universe
(@35min)". Archived from the original on 2014-03-11. Retrieved 2014-03-11. Portals: History Astronomy Stars Spaceflight Outer space Solar System Science
Cosmic_Calendar
Gravitational process studied in astronomy
protostar and early star has to be observed in infrared astronomy wavelengths, as the extinction caused by the rest of the cloud in which the star is forming
Star_formation
Northern pole-star; brightest star in Ursa Minor
notional magnitude error of ±0.1 would correspond to roughly ±6 pc error. Extinction was concluded to be negligible. Parallax 7.56±0.48 mas Parallax 7.54±0
Polaris
L.; Zwick, L. (2021). "Maximum accretion rate of supermassive stars". Astronomy & Astrophysics. 652: L7. arXiv:2105.13373. Bibcode:2021A&A...652L...7H
List_of_largest_stars
Star in the constellation Scutum
Astronomy & Astrophysics. 547: A15. arXiv:1208.3282. Bibcode:2012A&A...547A..15N. doi:10.1051/0004-6361/201219540. S2CID 42961348. Portals: Astronomy
Stephenson_2_DFK_1
Hypothesis of barriers to forming interstellar civilizations
probability threshold, which could lie in the past or following human extinction, might work as a barrier to the evolution of intelligent life, or as a
Great_Filter
Supermassive black hole at the center of the Milky Way
Sgr A* in the visible spectrum because of the effect of 25 magnitudes of extinction (absorption and scattering) by dust and gas between the source and Earth
Sagittarius_A*
Sky region containing dark interstellar clouds
Straižys, V.; et al. (1996). "Interstellar extinction in the area of the Serpens Cauda molecular cloud". Baltic Astronomy. 5 (1): 125–147. Bibcode:1996BaltA.
Serpens–Aquila_Rift
Classification term given to the first peoples who entered the American continents
as part of the Late Pleistocene megafauna extinctions. The potential role of human hunting in the extinctions has been the subject of much controversy
Paleo-Indians
Poorly understood class of astronomical objects
Unsolved problem in astronomy What is the nature of Little Red Dots? More unsolved problems in astronomy Little Red Dots (LRDs) are a class of small, red-tinted
Little_Red_Dots
Flash of gamma rays from a distant galaxy
In gamma-ray astronomy, gamma-ray bursts (GRBs) are extremely energetic events occurring in distant galaxies that represent the brightest and most powerful
Gamma-ray_burst
Multiple star system in the constellation Ophiuchus
the nearest, and it is visible from both hemispheres. The interstellar extinction (AV) of Rho Ophiuchi is measured to be 1.45 magnitudes, meaning the dust
Rho_Ophiuchi
Red supergiant star in the constellation Orion
the last 50 years, suggesting that the dimming was due to a change in extinction around the star rather than a more fundamental change. A study using the
Betelgeuse
Timeline of stellar astronomy 1200 BC — Chinese star names appear on oracle bones used for divination. 134 BC — Hipparchus creates the magnitude scale
Timeline_of_stellar_astronomy
source of the Sun's energy was determined in the 1920s, the dimming or extinction of the Sun remained a recurring theme in disaster stories, with occasional
Sun_in_fiction
Stellar core remnant
University. Archived from the original on 6 July 2024. White dwarf images at Astronomy Picture of the Day Portals: Physics Astronomy Stars Outer space Science
White_dwarf
"New stellar encounters discovered in the second Gaia data release". Astronomy & Astrophysics. 616 (37): A37. arXiv:1805.07581. Bibcode:2018A&A...616A
List_of_nearest_stars
Scatter plot of stars showing the relationship of luminosity to stellar classification
apparent magnitude (where the effect is called "extinction"). Color distortion (including reddening) and extinction (obscuration) are also apparent in stars
Hertzsprung–Russell_diagram
Museum
Extinction Gallery. This exhibit focuses on all aspects of extinction throughout the history of life on this planet including present-day extinctions
Buffalo_Museum_of_Science
Collision of two astronomical objects
mass extinctions. The prehistoric Chicxulub impact, 66 million years ago, is believed to be the cause not only of the Cretaceous–Paleogene extinction event
Impact_event
recovery plan for the kākāpō in 1989. The Cretaceous–Paleogene (K–Pg) extinction event, when dinosaurs became extinct, was shown to be linked to excess
1980s in science and technology
1980s_in_science_and_technology
Hawaiian volcano
experience in solar astronomy. This culminated in funds being awarded to the "upstart" UH proposal. UH rebuilt its small astronomy department into a new
Mauna_Kea
Substellar object
this hypothesis has fallen out of favor. Fusor (astronomy) Brown-dwarf desert – Concept in astronomy Hot Jupiter Blue dwarf (red-dwarf stage) – Hypothetical
Brown_dwarf
HgMn star; Microscopium
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111
HD_194783
Open cluster in the constellation Sagittarius
than two dozen stars are visible in an amateur telescope. The average extinction AV due to interstellar dust along the line of sight from the Earth is
NGC_6530
Records of Earth's development
life on land; the Mesozoic, which spanned the rise, reign, and climactic extinction of the non-avian dinosaurs; and the Cenozoic, which saw the rise of mammals
History_of_Earth
Study of the movement of stars
Book of Astronomy. Cambridge: Cambridge University Press. ISBN 978-1-139-49522-6. Gillman, M.; Erenler, H. (2008). "The galactic cycle of extinction" (PDF)
Stellar_kinematics
few hundred have been given proper names in the history of astronomy. Traditional astronomy tends to group stars into constellations or asterisms and give
List_of_proper_names_of_stars
Am star; Corona Australis
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904
HD_169853
field of astronomy. They may have won major prizes or awards, developed or invented widely used techniques or technologies within astronomy, or are directors
List_of_astronomers
Variable star
years. The visual magnitude of this star is reduced by 0.38 because of extinction from interstellar dust. It is 0.05 degree north of the ecliptic, so can
Omega2_Scorpii
F-type subgiant; Sextans
current distance, HD 84607's brightness is diminished by an interstellar extinction of 0.18 magnitudes and it has an absolute magnitude +1.12. HD 84607 has
HD_84607
Spectroscopic binary; Camelopardalis
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904
HD_33541
Mermilliod edition UBV M in 1987 and extended in 1993. As the atmospheric extinction problem associated with the UBV photometric system became evident, the
UBV Photoelectric Photometry Catalogue
UBV_Photoelectric_Photometry_Catalogue
Blue giant in the constellation Apus
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5". Astronomy & Astrophysics. 658: A91. arXiv:2111
HD_128294
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EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
Girl/Female
Arabic
Bird; High-flying; In Astronomy Altair is a Star of the First Magnitude
Male
English
From Latin geminus GEMINI means "twin." In Astrology, it is a zodiac sign. In Astronomy, it is the name of a constellation. In Roman mythology, Castor and Pollux are the Gemini twins, the sons of Leda, brothers to Helen of Troy and Clytemnestra. In Greek they are called the Dioskouroi.
Female
English
Modern English name derived from the Sanskrit word nirvana, NIRVANA means "disappearance, extinction (of the soul)."Â
Female
Hebrew
(×ַלְיָה) Aramaic and Hebrew name ALYA means "dirge, elegy" or "sheep's tail." In astronomy, this is the traditional name for Theta Serpentis, a star in the constellation Serpens.Â
Boy/Male
Hindu, Indian, Sanskrit, Tamil, Telugu
Name of a Celestial Star; The Second Nakshatra in Hindu Astronomy; God of Good Luck
Female
Greek
(ΟυÏανία) Greek myth name of a muse of astronomy, derived from the word ouranios, OURANIA means "heavenly."
Girl/Female
Australian, British, Christian, English, French, German, Greek, Italian, Portuguese
Heavenly; Muse of Astronomy
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
EXTINCTION ASTRONOMY
n.
A method or practice of the administration of the sacrament by dipping the bread or wafer in the wine and administering both together.
n.
Extinction.
n.
The act of obliterating, or the state of being obliterated; extinction.
n.
State of being extinguished or of ceasing to be; destruction; suppression; as, the extinction of life, of a family, of a quarrel, of claim.
n.
Extraction; descent.
n.
The act of tingeing or dyeing.
n.
Act of wasting away; a consuming; extinction.
n.
The act of extracting, or drawing out; as, the extraction of a tooth, of a bone or an arrow from the body, of a stump from earth, of a passage from a book, of an essence or tincture.
n.
Descent; pedigree; extraction.
n.
Act of quenching or extingishing.
n.
A building up; construction.
n.
The annihilation or extinction of a right or obligation.
v. i.
Total privation or loss; extinction; cessation; as, the death of memory.
n.
Extraction.
n.
Lineage; extraction; descent; sometimes, high birth; noble extraction.
n.
Good extraction; dignity of birth.
n.
The act of extinguishing or making extinct; a putting an end to; the act of putting out or destroying light, fire, life, activity, influence, etc.
n.
End; conclusion; termination; extinction.
a.
Of mean extraction.
n.
A coming to a close; cessation; extinction; termination; end.
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