Supergiants are among the most massive and most luminous stars. Supergiant stars occupy the top region of the Hertzsprung–Russell diagram with absolute visual magnitudes between about −3 and −8. The temperature range of supergiant stars spans from about 3,400 K to over 20,000 K. See more The title supergiant, as applied to a star, does not have a single concrete definition. The term giant star was first coined by Hertzsprung when it became apparent that the majority of stars fell into two distinct regions of the See more O type main-sequence stars and the most massive of the B type blue-white stars become supergiants. Due to their extreme masses, they have … See more Supergiants are rare and short-lived stars, but their high luminosity means that there are many naked-eye examples, including some of the brightest stars in the sky. Rigel, the brightest star in … See more • Tempesti, Piero, ed. (1979). Enciclopedia dell'Astronomia. Curcio. • http://alobel.freeshell.org/rcas.html • http://www.solstation.com/x-objects/rho-cas.htm See more 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 See more Most type II supernova progenitors are thought to be red supergiants, while the less common type Ib/c supernovae are produced by hotter … See more • List of stars with resolved images • Planetary nebula See more WebAn extremely large red giant star with a minimum of 15 solar masses. The best known …
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WebJan 21, 2024 · A red giant is a dying star in the final stages of stellar evolution. In about five billion years, our own sun will turn into a red giant, expand and engulf the inner planets — possibly even Earth. WebSep 17, 2024 · A red giant is a star in its death stages. It has slowly swollen up to many … harvard faculty club mothers day brunch
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WebIn 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.Each line indicates a particular chemical element or molecule, with the … WebJan 10, 2024 · A good example of a red supergiant is the star Betelgeuse, in the constellation Orion. Most stars of this type are between 200 and 800 times the radius of our Sun. The very largest stars in our galaxy, all red … WebTwo stars at the same spectral type, say type G, can have quite different brightnesses. One could be a main sequence star with M = +5 and the other a giant star with M = –2.5. By the definition of spectral type, both stars have the same surface temperature T, yet their luminosities L differ by 7.5 magnitudes or a factor of 1000 in luminosity. harvard faculty club parking