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Star in the constellation Centaurus
Lambda Centauri is a star in the southern circumpolar constellation of Centaurus. Its name is a Bayer designation that is Latinized from λ Centauri, and
Lambda_Centauri
H II region and open cluster in the constellation Centaurus
IC 2944, also known as the Running Chicken Nebula, the Lambda Centauri Nebula or the λ Centauri Nebula, is an open cluster with an associated emission
IC_2944
Star system in the Centaurus constellation
stars: Rigil Kentaurus (Alpha Centauri A), Toliman (Alpha Centauri B), and Proxima Centauri (Alpha Centauri C). Proxima Centauri is the closest star to the
Alpha_Centauri
Astronomical objects catalogued by Patrick Moore
6087) as NGC 6067 and incorrectly labelled the Lambda Centauri Cluster (IC 2944) as the Gamma Centauri Cluster. The Caldwell Catalogue has generated controversy
Caldwell_catalogue
Maximum brightness 2.14 2.115 Denebola Star 2.17 Gamma Centauri Binary star system 2.21 2.14 Lambda Velorum (Suhail) Star 2.23 Gamma Cygni (Sadr) Star Suspected
List of brightest natural objects in the sky
List_of_brightest_natural_objects_in_the_sky
Nearest OB association to Earth
association; only a few stars are exceptions, such as Alpha Centauri, Gacrux, Theta Centauri and Iota Centauri, which appear in this region of the sky only due to
Scorpius–Centaurus association
Scorpius–Centaurus_association
NASA satellite of the Explorer program
Puppis A, which is a supernova remnant The Rho Ophiuchi cloud complex Lambda Centauri nebula, a star-forming region in the Milky Way The Helix Nebula, a
Wide-field Infrared Survey Explorer
Wide-field_Infrared_Survey_Explorer
could theoretically be used to read newspapers on a planet circling Alpha Centauri, over four light-years distant. Unfortunately, the wave nature of light
Spatial_cutoff_frequency
Star in the constellation Centaurus
Eta Centauri as both a Gamma Cassiopeiae variable and a Lambda Eridani variable with variations caused by its rotation and pulsations. Eta Centauri has
Eta_Centauri
Constellation in the southern celestial hemisphere
Pacific constellations also included Gamma Centauri. Torres Strait Islanders in modern-day Australia saw Gamma Centauri as the handle and the four stars as the
Crux
Cosmological phenomenon
cosmology, which also includes cold dark matter (CDM) and is known as the Lambda-CDM model. In the decades since the detection of cosmic microwave background
Accelerating expansion of the universe
Accelerating_expansion_of_the_universe
Branch of physics that studies mathematical models of the universe
there is a fourth "sterile" species of neutrino. The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological
Physical_cosmology
Pattern of stars recognized on Earth's night sky
objects), and with the first-magnitude stars Alpha Centauri (the closest star to the Sun) and Beta Centauri pointing at the cross, distinguishing the cross
Asterism_(astronomy)
Cosmological process in the early universe
Earliest quasar / black hole ← Omega Centauri ← Andromeda Galaxy ← Milky Way spirals ← NGC 188 star cluster ← Alpha Centauri ← Accelerated expansion ← Earth
Reionization
Cosmological time duration
One is based on a particle physics model of the early universe called Lambda-CDM, matched to measurements of features from very early in the history
Age_of_the_universe
System of two stars orbiting each other
denote the pair (for example, the binary star α Centauri AB consists of the stars α Centauri A and α Centauri B.) Additional letters, such as C, D, etc.,
Binary_star
Measure of radiant energy over surface area
larger than the star's diameter. For instance, the irradiance of Alpha Centauri A (radiant flux: 1.5 L☉, distance: 4.34 ly) is about 2.7 × 10−8 W/m2 on
Irradiance
as well as 4 sub-brown dwarfs. The closest system is Alpha Centauri, with Proxima Centauri as the closest star in that system, at 4.2465 light-years from
List_of_nearest_stars
Small number of stars that orbit each other
outlying red dwarf, Proxima Centauri. Together, Rigil Kentaurus and Toliman form a physical binary star, designated as Alpha Centauri AB, α Cen AB, or RHD 1
Star_system
American gay collegiate fraternity
Delta Lambda Phi Social Fraternity (ΔΛΦ, DLP, or Lambda) is an American social fraternity for gay, bisexual, transgender and progressive men. The fraternity
Delta_Lambda_Phi
make a detectable contribution. For example, the binary star system Alpha Centauri has the total or combined magnitude of −0.27, while its two component stars
List_of_brightest_stars
Changed position of star vs background
first successful parallax measurements in 1832–1838, for the stars Alpha Centauri, Vega, and 61 Cygni. Stellar parallax is so small that it was unobservable
Stellar_parallax
Stellar classification
other well-known examples of G-type main-sequence stars include Alpha Centauri A, Tau Ceti, and 51 Pegasi. The term yellow dwarf is a misnomer, because
G-type_main-sequence_star
Planetary system consisting of the Sun and objects orbiting it
called the Local Cloud. The closest star to the Solar System, Proxima Centauri, is 269,000 AU (4.25 ly) away. Both are within the Local Bubble, a relatively
Solar_System
Script used to write the Greek language
the brightest star in the constellation of Centaurus is known as Alpha Centauri. For historical reasons, the Greek designations of some constellations
Greek_alphabet
Star at the centre of the Solar System
triple star system Alpha Centauri, which is about 4.4 light-years away and may be in the Local Bubble's G-Cloud. Alpha Centauri A and B are a closely tied
Sun
Settlement حضار Beta Centauri Hamal Raʾs al-Ḥamal (head of) the Ram رأس الحمل Alpha Arietis Heka al-Haqʿah the White Spot الهقعة Lambda Orionis see also Meissa
List_of_Arabic_star_names
Constellation straddling the celestial equator
Solar System (the only stars closer are the Alpha Centauri binary star system and Proxima Centauri), lies in Ophiuchus. It is located to the left of β
Ophiuchus
Study of the universe
parameterization of the Big Bang with dark matter and dark energy, known as the Lambda-CDM model. Theoretical astrophysicist David N. Spergel has described cosmology
Cosmology
Ab B8:p Lambda Aquarii (Hydor/Shatabhisha) 365 ± 10 Aquarius M2.5 IIIa Fe–1 3.722 Alpha Antliae 366 ± 6 Antlia K4III 4.25 PDS 70 (V1032 Centauri) 366.6
List of star systems within 350–400 light-years
List_of_star_systems_within_350–400_light-years
Systematic designations to unambiguously identify astronomical objects
are used, such as for A Centauri (A Cen), D Centauri (D Cen), G Scorpii (G Sco), P Cygni (P Cyg), b Sagittarii (b Sgr), d Centauri (d Cen) and s Carinae
Astronomical naming conventions
Astronomical_naming_conventions
Observation in physical cosmology
Soltis, J.; Casertano, S.; Riess, A. G. (2021). "The Parallax of Omega Centauri Measured from Gaia EDR3 and a Direct, Geometric Calibration of the Tip
Hubble's_law
Hot, giant star of early spectral type
bright stars in the night sky are examples of blue giants, including Beta Centauri (B1III); Mimosa (B0.5III); Bellatrix (B2III); Epsilon Canis Majoris (B2II);
Blue_giant
History and future of the universe
version of the hot Big Bang model using conventional physics, known as Lambda-CDM, agrees with a wide array of astrophysical observations. The concept
Chronology_of_the_universe
Stellar classification
sufficient time to leave the main sequence. Well-known examples include Alpha Centauri B (K1 V), Epsilon Indi (K5 V) and Epsilon Eridani (K2 V). There are subdwarf
K-type_main-sequence_star
Sterne bei α Centauri", Astronomische Nachrichten, volume 206, 1918 Bibcode:1918AN....206...97H Harold L. Aden, "Alpha and Proxima Centauri", Astronomical
List_of_star_extremes
All of space observable from the Earth at the present
at the center, inner and outer planets, Kuiper belt, Oort cloud, Alpha Centauri, Perseus Arm, Milky Way galaxy, Andromeda Galaxy, nearby galaxies, Cosmic
Observable_universe
American actor
University in 1974. While at Auburn, O'Neill was inducted as a brother of Lambda Chi Alpha. After attending Auburn, he spent time under the tutelage of actor
Michael_O'Neill_(actor)
330 ± 10 Draco B6III +3.17 HD 129116 (b Centauri) 330 ± 10 B3V 4.01 Has one confirmed exoplanet (b Centauri b). ESO 439-26 330 ± 20 DC9 +20.52 Least
List of star systems within 300–350 light-years
List_of_star_systems_within_300–350_light-years
American fiction writer (1896–1975)
Shasta Publishers, 1950. "Sidewise in Time", Astounding, June 1934 "Proxima Centauri", Astounding, March 1935 "A Logic Named Joe" (as Will F. Jenkins), Astounding
Murray_Leinster
Equuleus. Proxima Centauri α Centauri C Centaurus Latin The nearest star to the Sun. /ˌprɒksɪmə sɛnˈtɔːraɪ/ Przybylski's Star† V816 Centauri Centaurus eponymous
List_of_proper_names_of_stars
Physical acceleration experienced by an object
ν U μ U ν {\displaystyle A^{\lambda }:={\frac {DU^{\lambda }}{d\tau }}={\frac {dU^{\lambda }}{d\tau }}+\Gamma ^{\lambda }{}_{\mu \nu }U^{\mu }U^{\nu }}
Proper_acceleration
Dim, low mass stars on the main sequence
stricter definitions of a red dwarf is visible to the naked eye. Proxima Centauri, the star nearest to the Sun, is a red dwarf, as are fifty of the sixty
Red_dwarf
Kepler-80 2012 0.73 M☉ Least distant Proxima Centauri 1917 4.2 ly (1.3 pc) This is also known as Alpha Centauri C and is a member of the α Cen trinary system
List_of_red_dwarfs
of eclipsing binaries are Epsilon Aurigae (Almaaz), VV Cephei, and V766 Centauri (HR 5171). Angular diameter measurements can be inconsistent because the
List_of_largest_stars
Clandestine term
CPUs: Agena (Beta Centauri), Toliman (Alpha Centauri), Kuma (Nu Draconis), Deneb (Alpha Cygni), Propus (Eta Geminorum), Heka (Lambda Orionis), Rana (Delta
Code_name
Elliptical globular cluster in the constellation Sagittarius
color spread of its red giant branch (RGB) sequence, akin to that in Omega Centauri, it became the object of intense scrutiny starting in 1977 with James E
Messier_22
Solar System Alpha Centauri (Rigil Kentaurus) (4.3441±0.0022 ly) K-type main-sequence star B (Toliman) red dwarf C (Proxima Centauri) (4.2465 ± 0.0003
Lists_of_stars
Brightness of a celestial object observed from the Earth
the night sky Yes −1.0 251% 1 (Sirius) 00.0 100% 5 (Vega, Canopus, Alpha Centauri, Arcturus) 01.0 40% 15 02.0 16% 48 03.0 6.3% 171 04.0 2.5% 513 05.0 1.0%
Apparent_magnitude
Kervella, P.; Thévenin, F.; Lovis, C. (2017-02-01). "Proxima's orbit around α Centauri". Astronomy and Astrophysics. 598: L7. arXiv:1611.03495. Bibcode:2017A&A
List of nearest stars by spectral type
List_of_nearest_stars_by_spectral_type
Type of star larger than main-sequence but smaller than a giant
typical log(g) values for K class stars are 1.59 (Aldebaran) and 4.37 (α Centauri B), leaving plenty of scope to classify subgiants such as η Cephei with
Subgiant
Constellation in the northern celestial hemisphere
and the fifth-brightest star in all, surpassed only by Arcturus, Alpha Centauri, Canopus, and Sirius. Vega was the pole star in the year 12,000 BCE, and
Lyra
Logarithmic measure of the brightness of an astronomical object
absolute magnitude −5.8) appears slightly dimmer in the sky than Alpha Centauri A (apparent magnitude 0.0, absolute magnitude 4.4) even though it emits
Magnitude_(astronomy)
Large self-illuminated object in space
behind. The nearest star to the Earth, apart from the Sun, is Proxima Centauri, 4.2465 light-years (40.175 trillion kilometres) away. Travelling at the
Star
B1Vn 12.4 5.4 14,000 1.75 Beta Centauri (Hader Aa) 361 ± 2 B1 III 12.02±0.13 9.16 31600+18500 −11700 0.61 Eta Centauri 306 ± 6 B1.5 Vne 12.0±0.3 6.10±0
List_of_nearest_massive_stars
Star in the constellation Grus
Aldhanab). Confusingly, Alnair was also given as the proper name for Zeta Centauri in an astronomical ephemerides in the middle of the 20th century. In 2016
Alpha_Gruis
Constellation in the southern celestial hemisphere
eccentric orbit. The second-brightest globular cluster in the sky after Omega Centauri, 47 Tucanae (NGC 104) lies just west of the Small Magellanic Cloud. Only
Tucana
Boschi, F.; Munari, U. (August 2003). "High resolution spectroscopy over lambda lambda 8500-8750 Å for GAIA. IV. Extending the cool MK stars sample". Astronomy
List of star systems within 30–35 light-years
List_of_star_systems_within_30–35_light-years
Clustering of stars in astronomy diagram
red-giant-branch stars from different populations can overlap. This occurs in ω Centauri where metal-poor red-giant-branch stars have the same or hotter temperatures
Red_clump
Continuous band of stars that appears on plots of stellar color versus brightness
Size comparison of main sequence stars, including Proxima Centauri, the Sun, and Sirius, and the blue giant Spica
Main_sequence
List of largest planets by size
Benedict, G. Fritz (20 April 2021). "Precision millimeter astrometry of the α Centauri AB system". The Astronomical Journal. 162 (1): 14. arXiv:2104.10086. Bibcode:2021AJ
List_of_largest_exoplanets
Substellar object
the Sun. Luhman 16 is the third closest system to the Sun after Alpha Centauri and Barnard's Star. In the 1960s Shiv Kumar theorized the existence of
Brown_dwarf
Exoplanets confirmed or discovered from direct imaging
of Images Although listed in the table below, the identities of Alpha Centauri candidate 1, FW Tau b, 2MASS J044144 b, CVSO 30 c and HD 100546 b are disputed
List of directly imaged exoplanets
List_of_directly_imaged_exoplanets
Constellation in the southern celestial hemisphere
NGC 6752, the fourth-brightest globular cluster in the sky, after Omega Centauri, 47 Tucanae and Messier 22. An estimated 100 light years across, it is
Pavo_(constellation)
Open cluster in the constellation Centaurus
John Herschel on Jul 6, 1836. NGC 5606 is about 2.1 degrees from Alpha Centauri. The open cluster NGC 5617 is in the same region of the sky. The galactic
NGC_5606
Main sequence II Beta Centauri Aa (Hadar) 14h 03m 49.40535s −60° 22′ 22.9266″ Centaurus 361 ± 2 B1 III Blue giant II Beta Centauri Ab (Hadar) 14h 03m 49
List_of_supernova_candidates
Monocerotis 450 ± 20 Monoceros K4III Chi Carinae 450 ± 30 Carina B3IVp V1400 Centauri 450.8 ± 0.9 Centaurus K5 IVe Li 12.2–15.6 HD 100655 (Formosa) 451 ± 2 G9
List of star systems within 450–500 light-years
List_of_star_systems_within_450–500_light-years
accuracy smaller than the width of a human hair! (that is, to Proxima Centauri at 4.0208×1013 km). "The Nobel Prize in Physics 2017". Nobel Foundation
History_of_black_hole_physics
Star in the constellation Circinus
South African asterism "Eyes of the Lion", consisting of Alpha and Beta Centauri. If these stars are the lion's eyes, the lion's face covers Alpha Circini
Alpha_Circini
Sun-centered astronomical model
Thomas Henderson measured the parallaxes of other stars, Vega and Alpha Centauri. Experiments like those of Foucault were performed by V. Viviani in 1661
Heliocentrism
Measure of observed changes in the apparent locations of stars
Barnard's Star, about 6 light-years away. After the Sun and the Alpha Centauri system, it is the nearest known star. Being a red dwarf with an apparent
Proper_motion
(J2000) Distance (Light-years) Apparent Absolute Sun G2V −26.74 4.80 — — 0 α Centauri A (Rigil Kentaurus) G2V −0.01 4.34 14h 39m 36.50s −60° 50′ 02.3″ 4.34
List_of_nearest_bright_stars
Boundary between solar corona and wind
(1 October 2020). "An Earth-like Stellar Wind Environment for Proxima Centauri c". The Astrophysical Journal Letters. 902 (1): L9. arXiv:2009.07266. Bibcode:2020ApJ
Alfvén_surface
Rare star with tremendous luminosity and high rates of mass loss by stellar winds
(V1302 Aql) Omicron1 Centauri Phi Cassiopeiae R Puppis Rho Cassiopeiae RSGC1-F15 V382 Carinae V399 Carinae V509 Cassiopeiae V810 Centauri A V1427 Aquilae Variable
Hypergiant
2015 detection made by LIGO interferometers
human hair ~ 0.02–0.04 millimeter (0.02–0.04×10−3 m); distance to Proxima Centauri ~ 4.423 light-years (4.184×1016 m); ratio of hair/distance to star = 5–10×10−22
First observation of gravitational waves
First_observation_of_gravitational_waves
Bookkeeping survey of stars
times more luminous than the nearest star, a red dwarf named Proxima, or α Centauri C. Even though Proxima is only 4.2 light-years away from us, it is so dim
Star_count
Branch of SETI
Paul Fitzpatrick at MIT, describes a virtual machine that is derived from lambda calculus. Logic Gate Matrices (a.k.a. LGM), developed by Brian McConnell
Communication with extraterrestrial intelligence
Communication_with_extraterrestrial_intelligence
Astrophysical phenomenon
of the Regor or Gamma Velorum system. Mimosa, Acrux and Hadar or Beta Centauri, three bright star systems in the southern constellation of Crux and Centaurus
Supernova
Star that has a supergiant luminosity class, with a spectral type of F or G
than the Sun for stars such as W Virginis, to 20 M☉ or more (e.g. V810 Centauri). Corresponding surface gravities (log(g) cgs) are around 1–2 for high-mass
Yellow_supergiant
Distribution within a group of stars of the ratio of iron to hydrogen in a star
K. B. (2002). "The Metallicity Distribution Function of omega Centauri". Omega Centauri. 265: 143. arXiv:astro-ph/0112169. Bibcode:2002ASPC..265..143F
Metallicity distribution function
Metallicity_distribution_function
Binary star system in the constellation Cassiopeia
Cassiopeiae (Caph), Kappa Cassiopeiae, Alpha Cassiopeiae (Schedar) and Lambda Cassiopeiae. Consequently, the Chinese name for Eta Cassiopeiae itself is
Eta_Cassiopeiae
Asteroid
Exoplanets Alpha Centauri Ab (unconfirmed) COCONUTS-2b Gliese 486 b HD 108236 f HD 110082 b Kepler-1704b KOI-5Ab L 98-59 e f Lalande 21185 c Lambda Serpentis
(231937)_2001_FO32
SiEuCr 2.88 32.7227±0.5844 COCONUTS-3 (WISE J0813-1522) A 100.7 M5 B L6 Lambda Geminorum 100.9 ± 0.6 Gemini 07h 18m 05.58012s +16° 32′ 25.3964″ A3V +3
List of star systems within 100–150 light-years
List_of_star_systems_within_100–150_light-years
List from the Alphabet Direction (αβ)
– Aage Sandqvist (dark nebulae) (for example: Sandqvist 169 near Alpha Centauri) SACS – Second Astrolabe Catalogue of Santiago SAI – Sternberg Astronomical
List of astronomical catalogues
List_of_astronomical_catalogues
Fictional universe created by Larry Niven
by humans under strict protocols. Wunderland is a planet circling Alpha Centauri, and was the earliest extra-solar colony in Known Space's human history
Known_Space
Constellation in the southern celestial hemisphere
the south and Ara to the east. It lies near the Pointers (Alpha and Beta Centauri), with only Circinus in between. The constellation is located within the
Triangulum_Australe
0.007 14.66 DZ10.0 521 Canis Venatici 43.605 ± 0.009 10.26 M1V 525.1 1 Centauri Centaurus 63.3 ± 0.2 4.23 F2 V 536 Virgo 33.990 ± 0.009 9.707 M0V b c 526
List of Gliese and GJ objects (1-1000)
List_of_Gliese_and_GJ_objects_(1-1000)
Type of star
examples: HD 37017 A HD 144941 HR 7355 Sigma Lupi V2052 Ophiuchi V761 Centauri (a Centauri) is well-known for both the variability of its brightness and of
Helium-weak_star
Class of massive star with a spectral type of A to K
Omicron1 Centauri R Puppis IRC+10420 (V1302 Aql) IRAS 18357-0604 V766 Centauri (= HR 5171A) HD 179821 IRAS 17163-3907 V382 Carinae RSGC1-F15 V810 Centauri VdBH
Yellow_hypergiant
mechanics behaviour of the matter. 1915 – Robert Innes discovers Proxima Centauri, the closest star to Earth after the Sun. 1915 – Albert Einstein publishes
Timeline of cosmological theories
Timeline_of_cosmological_theories
Swiss astronomer
namely, ω Centauri and 47 Tucanae, through 2-D and 3-D investigations of their rotation fields. First application to the globular cluster ω Centauri of multi-mass
Georges_Meylan
Exoplanets Alpha Centauri Ab (unconfirmed) COCONUTS-2b Gliese 486 b HD 108236 f HD 110082 b Kepler-1704b KOI-5Ab L 98-59 e f Lalande 21185 c Lambda Serpentis
January–March_2021_in_science
Stage of stellar evolution
; Bono, G.; Brassard, P. (2011). "RAPIDLY PULSATING HOT SUBDWARFS IN ω CENTAURI: A NEW INSTABILITY STRIP ON THE EXTREME HORIZONTAL BRANCH?". The Astrophysical
Horizontal_branch
Supplement Series. 65: 405–409. Bibcode:1986A&AS...65..405O. ISSN 0365-0138. "Lambda Sgr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December
List_of_nearest_giant_stars
Gallenne, Alexandre; Kervella, Pierre; Rains, Adam D. (2026). "Proxima Centauri's Angular Diameter Revisited". arXiv:2610.33373 [astro-ph.SR]. Ekrem Murat
List_of_smallest_known_stars
Matter and radiation in the space between the star systems in a galaxy
brightness approaches the black body limit as ∝ λ 2.1 {\displaystyle \propto \lambda ^{2.1}} , and at wavelengths long enough that this limit is reached, they
Interstellar_medium
Star whose brightness fluctuates, as seen from Earth
or less. Several nearby red dwarfs are flare stars, including Proxima Centauri and Wolf 359. A superflare is a class of energetic, short duration flare
Variable_star
Indigenous people of Western Australia
line drawn from Alpha Centauri to Alpha Scorpionis, Antares. His right foot rests near 113 G of Lupus, and his left foot near Lambda and Upsilon Scorpionis
Bardi_people
Portion of the giant branch before helium ignition
densely populated low-mass subgiant branch seen in older clusters such as ω Centauri. Stars at the foot of the red-giant branch all have a similar temperature
Red-giant_branch
made between 2019 and 2020 that did not originate from around Proxima Centauri – and hence are likely results of forms of local radiofrequency interference
2021_in_science
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LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
LAMBDA CENTAURI
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