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...3406.63 (brightest star at the center) by [[Pan-STARRS]] Data Release 1 in blue, g, and r filters. | type = Late [[Blue supergiant star|O supergiant]] or candidate [[luminous blue variable|LBV]]<ref name=humphreys/> ...

...xtremely luminous, at over 14,000 L☉,<ref name=manick/> and it is the most luminous known star of its type in the galaxy. However, the star may be less luminous than it seems, as its spectral energy distribution is contaminated by a ver ...

...Wolf–Rayet star|Wolf-Rayet star]], as well as being a candidate [[Luminous blue variable]], located 4,142 light years away in the constellation of [[Scorpi <ref name="ASAS-SN">{{cite web |url=https://asas-sn.osu.edu/variables/lookup |website=ASAS-SN Variable Stars Database|title=ASAS-SN Variable Star ...

{{short description|Luminous blue variable star in the constellation Sagittarius}} | type=LBV<ref name=mauerhan>{{cite journal |title=Discovery of a Luminous Blue Variable with an Ejection Nebula Near the Quintuplet Cluster |journal=The A ...

'''Sigma Cygni''', Latinised from '''σ Cygni''', is a [[blue supergiant]] [[star]] in the [[constellation]] [[Cygnus (constellation)|Cyg ...<ref name=firnstein/> Allowing for this, the star is over 50,000 times as luminous as the sun. ...

...s:1998129|title=Hipparcos photometry of 24 variable massive stars (α Cygni variables)|journal=Astronomy and Astrophysics Supplement Series|volume=128|pages=117– ...istance Scale|volume=635|pages=149–174|last1=Bresolin|first1=Fabio|chapter=Blue Supergiants as a Tool for Extragalactic Distances — Empirical Diagnostics | ...

...s '''Population I Cepheids''', '''Type I Cepheids''', and '''Delta Cepheid variables'''. ...}</ref> [[Hubble Space Telescope]] (HST) observations of classical Cepheid variables have enabled firmer constraints on [[Hubble's law]], which describes the ex ...

|The closest [[blue supergiant]]. ...roscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500 |journal=The Astrophysical Journal Supplement Series |volu ...

...2024-05-28 |title=A shining cosmic dawn: spectroscopic confirmation of two luminous galaxies at z ∼ 14 |journal=[[Astrophysical Journal]] |volume=633 |issue=80 ...|first15=Casey |date=2023-08-14 |title=Confirmation and refutation of very luminous galaxies in the early universe |journal=Nature |volume=622 |issue=7984 |pag ...

...r wavelengths, i.e. the blue photons, which is why the sky is perceived as blue. On the other hand, at [[sunset]], when the atmosphere is denser, the light ...osite sides of the chromatic circle (green and magenta, yellow and violet, blue and orange) and adjacent colors are those that are close within the circle ...

...ntities can be known or measured more precisely than can the thermodynamic variables that define the state of a sample of water at its triple point. Consequentl ...time, and have settled to a permanent steady state, the relevant intensive variables are equal in the two bodies; for a diathermal wall, this statement is somet ...

...tion|classified]] according to the averages or typical ranges of different variables, most commonly temperature and precipitation.}} ...oves. In {{gli|surface weather analysis}}, cold fronts are symbolized by a blue line with triangles pointing in the direction of travel.}} ...

...5% was directly blackened by the X-rays. Thomas Alva Edison identified the blue-emitting [[calcium tungstate]] (CaWO4) as a suitable phosphor, which quickl ...e:Undark_(Radium_Girls)_advertisement,_1921.jpg|left|thumb|Advertising for luminous dials (1921)]] ...

{{defn|A type of optical disc written and read using a blue/violet laser.}} {{defn|The [[International System of Units|SI]] unit of luminous flux, the energy of visible light.}} ...

...in general. Illustrious scholars have debated this matter until they were blue in the face, and yet no consensus has been reached about whether mathematic ...stems whose [[Thermodynamic state|states]] are completely described by the variables [[pressure]] ({{mvar|p}}), [[volume]] ({{mvar|V}}) and [[temperature]] ({{m ...

...18}}</ref> change the color of indicators (e.g., turn red [[litmus paper]] blue), react with [[acid]]s to form [[salts]], promote certain chemical reaction ...[[normal distribution]] (informally a ''bell curve'') even if the original variables themselves are not normally distributed. The theorem is a key concept in pr ...