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Betelgeuse is the brightest near-infrared source in the sky with a J band magnitude of −2.99; [95] only about 13% of the star's radiant energy is emitted as visible light. If human eyes were sensitive to radiation at all wavelengths, Betelgeuse would appear as the brightest star in the night sky.
The Worlds of Aldebaran (French: Les Mondes d'Aldébaran) is a French science-fiction comic series written and illustrated by Léo and published by Dargaud in French and Cinebook in English. The Aldebaran saga is divided into 7 cycles: Aldebaran and its sequels Betelgeuse, Antares, Survivors, Return to Aldebaran, Neptune and Bellatrix.
Stellar classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines.
October 19, 2020 at 10:00 AM. Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star suggest it is both smaller — and ...
The disc and atmosphere of Betelgeuse (ESO) Supergiants have masses from 8 to 12 times the Sun (M ☉) upwards, and luminosities from about 1,000 to over a million times the Sun (L ☉). They vary greatly in radius, usually from 30 to 500, or even in excess of 1,000 solar radii (R ☉). They are massive enough to begin helium-core burning ...
Red supergiants (RSGs) are stars with a supergiant luminosity class (Yerkes class I) and a stellar classification K or M. [1] They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous. Betelgeuse and Antares A are the brightest and best known red supergiants (RSGs), indeed the only first ...
Red giant. A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M☉)) in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius large and the surface temperature around 5,000 K (4,700 °C; 8,500 °F) or lower. The appearance of the red giant is from yellow ...
Rigel is an intrinsic variable star with an apparent magnitude ranging from 0.05 to 0.18. [5] It is typically the seventh-brightest star in the celestial sphere, excluding the Sun, although occasionally fainter than Betelgeuse. [31] Rigel appears slightly blue-white and has a B-V color index of −0.06. [32]