Question

what is the star called Betelgeuse and The Rigel , what is the difference between white dwarf and red faint give examples other than Betelgeuse and The Rigel
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Answer 1

Answer:

Betelgeuse is usually the tenth-brightest star in the night sky and, after Rigel, the second-brightest in the constellation of Orion. It is a distinctly reddish semiregular variable star whose apparent magnitude, varying between +0.0 and +1.6, has the widest range displayed by any first-magnitude star. At near-infrared wavelengths, Betelgeuse is the brightest star in the night sky. Its Bayer designation is α Orionis, Latinised to Alpha Orionis and abbreviated Alpha Ori or α Ori.

Rigel /ˈraɪdʒəl/, designated β Orionis (Latinized to Beta Orionis, abbreviated Beta Ori, β Ori), is a blue supergiant star in the constellation of Orion, approximately 860 light-years (260 pc) from Earth. Rigel is the brightest and most massive component—and the eponym—of a star system of at least four stars that appear as a single blue-white point of light to the naked eye. A star of spectral type B8Ia, Rigel is calculated to be anywhere from 61,500 to 363,000 times as luminous as the Sun, and 18 to 24 times as massive, depending on the method and assumptions used. Its radius is over 70 times that of the Sun, and its surface temperature is 12,100 K. Rigel's mass-loss due to its stellar wind is estimated to be 10 million times more than that of the Sun. With an estimated age of 7 to 9 million years, Rigel has exhausted its core hydrogen fuel, expanded and cooled to become a supergiant. It will end its life as a type II supernova.

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Answer 2

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