Betelgeuse
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Context
- Betelgeuse, the star may explode in a violent supernova within tens of years according to new research
Betelgeuse
- Betelgeuse is a red supergiant star of spectral type M1-2 and one of the largest visible to the naked eye.
- It 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.
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PRACTICE QUESTION Q. Consider the following statements. a) Betelgeuse is a red supergiant star and one of the largest visible to the naked eye. b) Betelgeuse is about 7,500 to 14,000 times brighter than the Sun and it’s about 700 times the size of the Sun and around 15 times more massive. Which of the statements given above is/are correct? 1) Only a 2) Only b 3) Both a and b 4) Neither a nor b Correct Answer: Both a and b. |
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