A giant star is a star with substantially larger radius and luminosity than a main-sequence star of the same surface temperature. Typically, giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Stars still more luminous than giants are referred to as supergiants and hypergiants. A hot, luminous main-sequence star may also be referred to as a giant. Apart from this, because of their large radii and luminosities, giant stars lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II or III.
Famous quotes containing the words giant and/or star:
“The giant was hairy, the giant was horrid,
He had one eye in the middle of his forehead.”
—Ogden Nash (1902–1971)
“The star is the ultimate American verification of Jean Jacques Rousseau’s Emile. His mere existence proves the perfectability of any man or woman. Oh wonderful pliability of human nature, in a society where anyone can become a celebrity! And where any celebrity ... may become a star!”
—Daniel J. Boorstin (b. 1914)