Weegy: A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. [ So they lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III. A hot, luminous main-sequence star may also be referred to as a giant, but any main sequence star is properly called a dwarf no matter how large and luminous it is.
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Giant stars can have temperatures ranging from about 3,000 to 5,000 degrees Celsius (5,432 to 9,032 degrees Fahrenheit).
Added 349 days ago|12/20/2023 1:18:18 AM
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