R136a1

RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K.wikipedia
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Wolf–Rayet star

Wolf-Rayet starWolf-RayetWolf-Rayet stars
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).
The naked-eye stars Gamma Velorum and Theta Muscae, as well as the most massive known star, R136a1 in 30 Doradus, are all Wolf–Rayet stars.

R136

R136a
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus). In 1979, ESO's 3.6 m telescope was used to resolve R136 into three components; R136a, R136b, and R136c.
The cluster R136 contains many of the most massive and luminous stars known, including R136a1.

Apparent magnitude

apparent visual magnitudemagnitudevisual magnitude
In 1960, a group of astronomers working at the Radcliffe Observatory in Pretoria made systematic measurements of the brightness and spectra of bright stars in the Large Magellanic Cloud.

R136a3

The R136a system at the core of R136 is a dense luminous knot of stars containing at least 12 stars, the most prominent being R136a1, R136a2, and R136a3, all of which are extremely luminous and massive WN5h stars.
It is located near R136a1, the most massive and luminous star known.

NGC 2070

2070
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).
Among its stars are many of great dimension, including the most massive star known, R136a1, at 315 and 8.7 million.

Luminosity

luminousbolometric luminosityluminosities
Its Wide Field and Planetary Camera (WFPC) resolved R136a into at least 12 components and showed that R136 contained over 200 highly luminous stars.
For example, R136a1 has a temperature over 50,000 K and a luminosity of more than 8,000,000 L ⊙ (mostly in the UV), it is only 35 R ⊙.

List of most luminous stars

most luminousmost luminous starsmost luminous stars known
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).

List of most massive stars

most massivemassivemassive stars
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).

Light-year

light yearlight yearsMly
R136 is located approximately 157,000 light-years away from Earth in the Large Magellanic Cloud, positioned on the south-east corner of the galaxy at the centre of the Tarantula Nebula, also known as 30 Doradus.

List of hottest stars

hottestthe hottest stars known
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).

Open cluster

open star clusterstar clusteropen clusters
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).

Dorado

Dorado constellationDorDorado (constellation)
RMC 136a1 (usually abbreviated to R136a1) has the highest mass and luminosity of any known star, at 315 and 8.7 million, and is also one of the hottest, at around 53,000 K. It is a Wolf–Rayet star at the center of R136, the central concentration of stars of the large NGC 2070 open cluster in the Tarantula Nebula (30 Doradus).

Large Magellanic Cloud

LargeLMCGreater Magellanic Cloud
In 1960, a group of astronomers working at the Radcliffe Observatory in Pretoria made systematic measurements of the brightness and spectra of bright stars in the Large Magellanic Cloud. Its cluster can be seen under mild magnification in the far southern celestial hemisphere, at magnitude 7.25; to perceive the outline of this star requires good telescopic magnification as it is five orders of magnitude fainter — it lies at a distance of about 49.97 kpc in the leading edge of a neighbouring highly dispersed galaxy, which has many large nebulae with highly active star formation, the Large Magellanic Cloud.

Radcliffe Observatory

Radcliffe ObserverOxfordRadcliffe
In 1960, a group of astronomers working at the Radcliffe Observatory in Pretoria made systematic measurements of the brightness and spectra of bright stars in the Large Magellanic Cloud.

Pretoria

Pretoria, South AfricaPretoria, GautengPretoria CBD
In 1960, a group of astronomers working at the Radcliffe Observatory in Pretoria made systematic measurements of the brightness and spectra of bright stars in the Large Magellanic Cloud.

Spectrum

spectraenergy spectrumspectral
In 1960, a group of astronomers working at the Radcliffe Observatory in Pretoria made systematic measurements of the brightness and spectra of bright stars in the Large Magellanic Cloud.

H II region

HII regionHII regionsH II
Subsequent observations showed that R136 was located in the middle of a giant region of ionized interstellar hydrogen, known as an H II region, which was a center of intense star formation in the immediate vicinity of the observed stars.

Nebula

nebulaediffuse nebulanebulosity
Subsequent observations showed that R136 was located in the middle of a giant region of ionized interstellar hydrogen, known as an H II region, which was a center of intense star formation in the immediate vicinity of the observed stars.

R136b

In 1979, ESO's 3.6 m telescope was used to resolve R136 into three components; R136a, R136b, and R136c.

R136c

In 1979, ESO's 3.6 m telescope was used to resolve R136 into three components; R136a, R136b, and R136c.

O-type star

O-typeOO-type stars
Estimates that the brightness of the central region would require as many as 100 hot O class stars within half a parsec at the centre of the cluster led to speculation that a star 3,000 times the mass of the Sun was the more likely explanation.

Parsec

Mpcpckpc
Estimates that the brightness of the central region would require as many as 100 hot O class stars within half a parsec at the centre of the cluster led to speculation that a star 3,000 times the mass of the Sun was the more likely explanation.

Star cluster

star clustersclusterC
The first demonstration that R136a was a star cluster was provided by Weigelt and Beier in 1985.

Speckle imaging

speckle interferometryspeckle interferometricimaging
Using the speckle interferometry technique, R136a was shown to be made up of 8 stars within 1 arcsecond at the centre of the cluster, with R136a1 being the brightest.