Betelgeuse


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Related to Betelgeuse: Rigel

Betelgeuse

(bēt`əljo͞oz'), bright star in the constellation OrionOrion,
in astronomy, constellation located on the celestial equator. It is one of the most conspicuous and easily recognizable constellations in the entire sky. From ancient times it has been mentioned in the literature of many peoples and is traditionally depicted as the figure
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; Bayer designation α Orionis; 1992 position R.A. 5h54.8m, Dec. +7°24'. A red supergiant with a luminosity about 13,000 times that of the sun, it is of spectral classspectral class,
in astronomy, a classification of the stars by their spectrum and luminosity. In 1885, E. C. Pickering began the first extensive attempt to classify the stars spectroscopically.
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 M2 Iab. Betelgeuse is a semiregular variable starvariable star,
star that varies, either periodically or irregularly, in the intensity of the light it emits. Other physical changes are usually correlated with the fluctuations in brightness, such as pulsations in size, ejection of matter, and changes in spectral type, color, or
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 with apparent magnitudemagnitude,
in astronomy, measure of the brightness of a star or other celestial object. The stars cataloged by Ptolemy (2d cent. A.D.), all visible with the unaided eye, were ranked on a brightness scale such that the brightest stars were of 1st magnitude and the dimmest stars
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 ranging from 0.06 to 0.75; thus, at maximum brightness it is one of the 10 brightest stars in the sky. Betelgeuse marks the right shoulder of Orion; its distance is about 500 light-years.

Betelgeuse

(bee -t'l-jooz) (α Ori) A remote luminous red supergiant that is the second-brightest star in the constellation Orion. It is a semiregular variable with a period of about 5.8 years; the normal magnitude range is 0.3 to 0.9 but the magnitude has reached 0.15 and been as low as 1.3. It is a strong source of infrared radiation. IRAS found that the long-wavelength infrared is emitted from three concentric shells, the largest with a radius of 1.5 parsecs, ejected within the past 100 000 years. Images of the surface of Betelgeuse have been produced by various interferometry techniques, and indicate a nonuniform brightness. Mv : –5.7; spectral type: M2 Iab; diameter: about 500 times solar diameter; distance: 150 pc.

Betelgeuse

[′bed·əl‚jüs]
(astronomy)
An orange-red giant star of stellar magnitude 0.1-1.2, 650 light-years from the sun, spectral classification M2-Iab, in the constellation Orion; the star α Orionis.
References in periodicals archive ?
The changes in Betelgeuse and Antares are fairly subtle--though perceptible if you watch them carefully for a year or two.
The gigantic and bright star Betelgeuse is a superstar, and it is going to put on quite a farewell performance for Earth sometime within the next 1,000,000 years or so.
The /Xam Bushmen saw Aldebaran as "The Male Hartebeest", with Betelgeuse as its mate.
The dying red supergiant Betelgeuse, though, might better have been named "Ginormous.
Betelgeuse is a red supergiant, well past its prime of life, heading gloriously for disaster.
Alternately, he hears Jesus Christ and aliens from Betelgeuse telling him "everything is going to be cool" and voices of aliens threatening to abduct him.
In which constellation are the stars Betelgeuse and Rigel?
Sirius, Canopus, Alpha Centauri system, Arcturus, Vega, Capella system, Rigel, Procyon, Achernar, Betelgeuse
Thanks to Eugene resident Jerry Oltion's trackball telescope, there's no more bending over an eyepiece at odd angles trying to get a glimpse of Betelgeuse or the Seven Sisters.
Our guide, Mark Bonner, soon zeroed in on Mars, Saturn and its remarkable rings, the white-blue intensity of Sirius and the yellow-orange glow of Betelgeuse.
Al apuntar los telescopios gemelos a la brillante estrella Betelgeuse en la constelacion de Orion, se apago la luz de esta y se vio de manera completamente clara el polvo nebuloso que la rodea.
The wreck was only discovered by chance off Whiddy Island in the bay in the late 1970s, during clearance work following an explosion at the island oil terminal which destroyed the French oil tanker Betelgeuse and killed 50 people.